Compositor: Rename compositor build option

Currently, the compositor can be disabled using the WITH_COMPOSITOR
build option. Since, we intent to always build the realtime compositor,
we need to make the distinction between both compositors clear.

So this patch renames the option to WITH_COMPOSITOR_CPU. Additionally,
the check for the option was moved inside the compositor modules' own
CMake file in preparation for the realtime compositor code.

Differential Revision: https://developer.blender.org/D15622

Reviewed By: Jeroen Bakker, Ray Molenkamp

source/blender/python/intern/bpy_app_build_options.c

@@ -18,7 +18,7 @@ static PyStructSequence_Field app_builtopts_info_fields[] = {
     {"codec_avi", NULL},
     {"codec_ffmpeg", NULL},
     {"codec_sndfile", NULL},
-    {"compositor", NULL},
+    {"compositor_cpu", NULL},
     {"cycles", NULL},
     {"cycles_osl", NULL},
     {"freestyle", NULL},
@@ -104,7 +104,7 @@ static PyObject *make_builtopts_info(void)
   SetObjIncref(Py_False);
 #endif
 
-#ifdef WITH_COMPOSITOR
+#ifdef WITH_COMPOSITOR_CPU
   SetObjIncref(Py_True);
 #else
   SetObjIncref(Py_False);