[Chapel Merge] Make man pages on 'make docs'

Branch: refs/heads/master
Revision: 387505e
Author: mppf
Log Message:

Merge pull request #16864 from mppf/make-man-pages-on-make-docs

Make man pages on ‘make docs’

I noticed that make docs does not cause the man page for chpl to be
generated (although it does create the man page for chpldoc). This PR
updates make docs to always create both man pages.

Reviewed by @ben-albrecht - thanks!

Modified Files:
M Makefile.devel

Compare: https://github.com/chapel-lang/chapel/compare/c93c868ebdcc...387505edf921