Fix change_rpath for Linuxbrew
Fix change_rpath for Linuxbrew

Fix change_path so that patchelf is able to patch itself.
The link into opt does not yet exist while patchelf is being installed.

maxim-belkin/brew,rwhogg/brew,Linuxbrew/brew,rwhogg/brew,rwhogg/brew,maxim-belkin/brew,hanxue/linuxbrew,maxim-belkin/brew,hanxue/linuxbrew,hanxue/linuxbrew,Linuxbrew/brew,Linuxbrew/brew,Linuxbrew/brew