tachyon, primecountpy, libhomfly, m4ri: Fix build errors on Apple Silicon with homebrew

[mkoeppe]

reported in #30592 comment:33

... by extending .homebrew-build-env, as a hotfix.

CC: @dimpase @kiwifb @vbraun

Component: porting

Author: Matthias Koeppe

Branch/Commit: aee855a

Reviewer: François Bissey

Issue created by migration from https://trac.sagemath.org/ticket/33191

[mkoeppe]

Branch: u/mkoeppe/fix_build_errors_on_apple_silicon_with_homebrew

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

aee855a

.homebrew-build-env: Add libpng bdw-gc primesieve dirs to CPATH, LIBRARY_PATH

[mkoeppe]

Commit: aee855a

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,4 +1,4 @@
 reported in [#30592 comment:33](https://github.com/sagemath/sage/issues/30592#comment:33)
 
-... by extending .homebrew-build-env, as a hotfix.
+... by extending `.homebrew-build-env`, as a hotfix.
 

[kiwifb]

comment:4

That should work for case at hand. As a hotfix since extending the list that way is not sustainable.

[mkoeppe]

comment:5

Yes, only a hotfix for 9.5. The correct fix is to make these packages use pkg-config to get the paths for the dependencies

[kiwifb]

comment:6

Let's just get it in.

[kiwifb]

Reviewer: François Bissey

[mkoeppe]

comment:7

Thanks!

[vbraun]

Changed branch from u/mkoeppe/fix_build_errors_on_apple_silicon_with_homebrew to aee855a