cogl-path: fix compile outside of source tree
cogl-path: fix compile outside of source tree

cogl-path.h doesn't get included from cogl.h anymore. It also can't
include cogl-*.h headers directly and must include the whole cogl.h
instead.

Signed-off-by: Andreas Oberritter <obi@saftware.de>

Reviewed-by: Neil Roberts <822ec91a7ef82248fd36162ca8ac3283eba70848@linux.intel.com>

gcampax/cogl,gcampax/cogl,gcampax/cogl,djdeath/cogl,djdeath/cogl,gcampax/cogl,djdeath/cogl