av1_convolve_test: correct time units in output

`aom_usec_timer_*` provides microsecond times, not nanosecond.

Change-Id: I7acd1f30f9ba8484f6a3c3dfaf993f02708a75bc
diff --git a/test/av1_convolve_test.cc b/test/av1_convolve_test.cc
index 7acec93..9393675 100644
--- a/test/av1_convolve_test.cc
+++ b/test/av1_convolve_test.cc
@@ -401,7 +401,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -509,7 +509,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -618,7 +618,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -725,7 +725,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -826,7 +826,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -925,7 +925,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -1023,7 +1023,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -1122,7 +1122,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", filter, width, height, time1,
+    printf("%d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", filter, width, height, time1,
            time2, time1 / time2);
   }
 };
@@ -1338,7 +1338,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d - %d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", h_f, v_f, width, height,
+    printf("%d - %d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", h_f, v_f, width, height,
            time1, time2, time1 / time2);
   }
 };
@@ -1456,7 +1456,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d - %d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", h_f, v_f, width, height,
+    printf("%d - %d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", h_f, v_f, width, height,
            time1, time2, time1 / time2);
   }
 };
@@ -1581,7 +1581,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("%d - %d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", h_f, v_f, width, height,
+    printf("%d - %d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", h_f, v_f, width, height,
            time1, time2, time1 / time2);
   }
 };
@@ -1696,7 +1696,7 @@
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
 
-    printf("%d - %d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n", h_f, v_f, width, height,
+    printf("%d - %d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n", h_f, v_f, width, height,
            time1, time2, time1 / time2);
   }
 };
@@ -2230,7 +2230,7 @@
     }
     aom_usec_timer_mark(&timer);
     const double time2 = static_cast<double>(aom_usec_timer_elapsed(&timer));
-    printf("Dist Weighted: %d %3dx%-3d:%7.2f/%7.2fns (%3.2f)\n",
+    printf("Dist Weighted: %d %3dx%-3d:%7.2f/%7.2fus (%3.2f)\n",
            compound.UseDistWtdCompAvg(), width, height, time1, time2,
            time1 / time2);
   }