[chapel-lang/chapel] Fix faulty dependency while building protoc-gen-ch

Branch: refs/heads/master
Revision: ecc71a3
Author: mppf
Log Message:

Merge pull request #16328 from Aniket21mathur/Fix1

Fix faulty dependency while building protoc-gen-chpl

[PR by @Aniket21mathur - thanks!; tested and reviewed by @mppf]

Add source and header files as dependencies for building protoc-gen-chpl.

Modified Files:
M tools/protoc-gen-chpl/Makefile

Compare: https://github.com/chapel-lang/chapel/compare/ff3013b1e5f6...ecc71a319f00