cmake: use the EGL_CFLAGS_OTHER

Without them, the build will fail on a system without the X headers with
a recent Mesa from the master branch. The EGL_CFLAGS_OTHER define the
MESA_EGL_NO_X11_HEADERS macro that guards the #includes of the X
headers.
Signed-off-by: Mircea Gherzan <mircea.gherzan@intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>

CMakeLists.txt

@@ -402,6 +402,7 @@ endif()
 if(EGL_FOUND)
 	add_definitions(-DPIGLIT_HAS_EGL)
 	include_directories(${EGL_INCLUDE_DIRS})
+	add_definitions (${EGL_CFLAGS_OTHER})
 endif()
 
 if(PIGLIT_BUILD_GLES1_TESTS AND NOT EGL_FOUND)