test/test.cmake: fix parse error

broken since:
05a12ea97 Refactored warp_filter_test to allow reuse by external tests.

Change-Id: I4e562e3e4e6d06ffebb579167b11267ae5630c98
diff --git a/test/test.cmake b/test/test.cmake
index 3973d2d..209282c 100644
--- a/test/test.cmake
+++ b/test/test.cmake
@@ -43,7 +43,7 @@
     # TODO: not sure if this is intrinsics or a wrapper calling intrin/asm.
     set(AOM_UNIT_TEST_COMMON_SOURCES
         ${AOM_UNIT_TEST_COMMON_SOURCES}
-        "${AOM_ROOT}/test/warp_filter_test.cc")
+        "${AOM_ROOT}/test/warp_filter_test.cc"
         "${AOM_ROOT}/test/warp_filter_test_util.cc")
   endif ()
 endif ()