Make macosx-version-min affect function checks
Currently -mmacosx-version-min=10.10
is set by:
add_project_arguments('-mmacosx-version-min=10.10',
language: ['c', 'cpp', 'objc'])
add_project_link_arguments('-mmacosx-version-min=10.10',
language: ['c', 'cpp', 'objc'])
Unfortunately those do not affect function tests, see upstream meson bug MESON#3720.