guile: Depends on gperf for Linuxbrew (#1529)
guile: Depends on gperf for Linuxbrew (#1529)

Fix `gperf: command not found` error

Closes Linuxbrew/homebrew-core#1529
rwhogg/homebrew-core,LinuxbrewTestBot/homebrew-core,Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core