Fix CMake build configurations using linker flag dependent compiler flags.
Fix CMake build configurations using linker flag dependent compiler flags.

The CMake compiler test functions are built atop CMake's try_compile()
function. try_compile() ignores configuration specific link flags in
favor of the generic linker flag variable (CMAKE_EXE_LINKER_FLAGS is
used instead of CMAKE_EXE_LINKER_FLAGS_<CONFIG>). This patch applies
the flags cached in AOM_EXE_LINKER_FLAGS to CMAKE_EXE_LINKER_FLAGS
during C and C++ compiler tests.

Change-Id: I831244d114a8195527bcb865537494a98cabc170

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