Add the INCLUDE_DIRECTORIES directive to all the FindXXX modules.

Add the INCLUDE_DIRECTORIES directive to all the FindXXX modules.

If the header files are not at the standard location, we will FAIL
to compile because FIND_PATH directive will not add the Include Dir
to CXX flags. Add the INCLUDE_DIRECTORIES to handle this if we find
the headers we neeeds.

Signed-off-by: Junyan He <junyan.he@linux.intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>