Add test executables to AOM_APP_TARGETS list in the CMake build.
Add test executables to AOM_APP_TARGETS list in the CMake build.

Change-Id: Ia4ec99ce8f3dd0098764571777e78adac21b6e67

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom