libunwind: Use https for url
libunwind: Use https for url

==> brew audit libunwind --online
Error: 1 problem in 1 formula
libunwind:
* Stable: Please use https:// for
http://download.savannah.gnu.org/releases/libunwind/libunwind-1.1.tar.gz

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