llvm@7: Fix test on Linuxbrew
llvm@7: Fix test on Linuxbrew

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