gcc: Add option --with-glibc
gcc: Add option --with-glibc

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