fix: incorrectly-included /usr/local/include in Boost patches

[leo9800]

install prefix (usr/local) is included by accident in a patch to boost library, which breaks cmake on archlinux when invoking makechrootpkg

this PR fixed the paths in the patch file mentioned above

[lanewei120]

Hi @leo9800

just checked the path on mac,
usr/local/include/boost/process/detail/posix/executor.hpp
it should be correct

maybe we need to exclude this patch for non-mac platform?

[leo9800]

@lanewei120 unfortuately nope, it seems to be a installing path which includes the installation prefix (something like /usr or /usr/local) and it indeed break building on some linux distros, at least a building error linked to this issue was confirmed with arch linux and by applying the patch everything worked like a charm with arch pkgbuild