glibc: Fix permissions of ld.so and libc.so
glibc: Fix permissions of ld.so and libc.so

maxim-belkin/homebrew-core,rwhogg/homebrew-core,Linuxbrew/homebrew-core,forevergenin/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core,LinuxbrewTestBot/homebrew-core,forevergenin/homebrew-core,Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core