gcc: Remove --with-system-zlib [Linux]
gcc: Remove --with-system-zlib [Linux]

Fix the error:
gcc/lto-compress.c:28:18: fatal error: zlib.h: No such file or directory

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