Update CMakeLists.txt - ensure ftgl patches are relative to correct d…

[will-cern]

…irectory

this fixes issue where the build dir is somewhere underneath a git repo, which affects git apply behaviour

This Pull request:

Changes or fixes:

fixes issue discussed @ #21898 (comment)

Checklist:

• [ x] tested changes locally
• updated the docs (if necessary)

This PR fixes #

[ferdymercury]

Thanks! If this change is not harmful even if not needed on some OS or platforms, we should maybe change it the same way in all the other places, too?

builtins/cfitsio/CMakeLists.txt
builtins/ftgl/CMakeLists.txt
builtins/gl2ps/CMakeLists.txt
builtins/libgif/CMakeLists.txt
builtins/xxhash/CMakeLists.txt

Fixes #22415

[github-actions]

Test Results

    22 files      22 suites   3d 11h 15m 14s ⏱️
 3 863 tests  1 734 ✅ 0 💤 2 129 ❌
76 179 runs  74 050 ✅ 0 💤 2 129 ❌

For more details on these failures, see this check.

Results for commit f5d4b90.

♻️ This comment has been updated with latest results.

[will-cern]

Indeed. In fact, I guess for our builds these patches may have been silently not being applied! I've now fixed the builtins you mentioned

[ferdymercury]

Thanks!

[guitargeek]

Thanks!