pkg-config: update 0.29.1 bottle for Linuxbrew.
pkg-config: update 0.29.1 bottle for Linuxbrew.

Closes Linuxbrew/linuxbrew#1050.

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