Revert "gcc: align with homebrew-core"
Revert "gcc: align with homebrew-core"

This reverts commit 3c9fdc17cd02680856e7e600d6e4bb3c535b8f1e.

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