lua: Using our LDFLAGS

This is needed for Xcode-only installations, since the LDFLAGS matter.

Closes Homebrew/homebrew#12856.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>

Formula/lua.rb

@@ -39,6 +39,7 @@ class Lua < Formula
     inreplace 'src/Makefile' do |s|
       s.remove_make_var! 'CC'
       s.change_make_var! 'CFLAGS', "#{ENV.cflags} $(MYCFLAGS)"
+      s.change_make_var! 'MYLDFLAGS', ENV['LDFLAGS']
     end
 
     # Fix path in the config header