gmp: fix build on ARM (#3221)
gmp: fix build on ARM (#3221)


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