Linuxbrew: Use safe_system for patchelf

Use patchelf in opt_bin rather than bin to support using patchelf HEAD
Linuxbrew: Only change the loader of executables

Do not change the dynamic loader of shared libraries.
binutils: Add --default-names option for Linux

See Homebrew/homebrew#31814
glibc: Add additional tests
Merge branch 'master' of https://github.com/Homebrew/linuxbrew