Add 'modules' to doxygen generation.

Bug: skia:
Change-Id: Ia64aa8e8e75d0ed3a88dd34e63fc22c65cf9acc9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/217816
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
1 file changed