cmake deps problem : COMPOUND_ROUND && CONVOLVE_ROUND

COMPOUND_ROUND requires CONVOLVE_ROUND to work.   This cl
adds that dependency.

Change-Id: I83922ca3143d8e7a4bbac279790574fb9ba575e6

build/cmake/aom_experiment_deps.cmake

diff --git a/build/cmake/aom_experiment_deps.cmake b/build/cmake/aom_experiment_deps.cmake
index a6bf3f8..7480ceb 100644
--- a/build/cmake/aom_experiment_deps.cmake
+++ b/build/cmake/aom_experiment_deps.cmake
@@ -26,6 +26,12 @@
     endif ()
   endif ()
 
+  if (CONFIG_COMPOUND_ROUND)
+    if (NOT CONFIG_CONVOLVE_ROUND)
+	    change_config_and_warn(CONVOLVE_ROUND 1 CONFIG_COMPOUND_ROUND)
+    endif ()
+  endif ()
+
   if (CONFIG_CTX1D)
     if (NOT CONFIG_LV_MAP)
       change_config_and_warn(CONFIG_LV_MAP 1 CONFIG_CTX1D)