git 2.4.3: Fix tcl-tk dependency for Linuxbrew
git 2.4.3: Fix tcl-tk dependency for Linuxbrew

Change the dependency "homebrew/dupes/tcl-tk" to "tcl-tk"
to fix the circular error:

$ brew install git
==> Tapping Homebrew/dupes
You must: brew install git

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