Patch fails on MacOSX environment

[titsuki]

See: https://github.com/titsuki/raku-Algorithm-LibSVM/runs/6229978601?check_suite_focus=true

Something goes wrong on MacOSX:

Aborting due to build failure: Algorithm::LibSVM:ver<0.0.15> (use --force-build to override)
[Algorithm::LibSVM] The spawned command 'patch 3.25/svm.h 3.25/svm.h.patch -o svm.h' exited unsuccessfully (exit code: 1, signal: 0)
[Algorithm::LibSVM]   in method build at /Users/runner/work/raku-Algorithm-LibSVM/raku-Algorithm-LibSVM/lib/Algorithm/LibSVM/CustomBuilder.pm[6](https://github.com/titsuki/raku-Algorithm-LibSVM/runs/6229827657?check_suite_focus=true#step:6:6) (Algorithm::LibSVM::CustomBuilder) line 1[8](https://github.com/titsuki/raku-Algorithm-LibSVM/runs/6229827657?check_suite_focus=true#step:6:8)
[Algorithm::LibSVM]   in block <unit> at -e line 1
===> Building [FAIL]: Algorithm::LibSVM:ver<0.0.15>