create script/program to merge bromas, for gd updates

[matcool]

diffing and patching isnt good enough, that caused us a bunch of issues in early 2.206

[Stazzical]

Is using Entry.bro not enough for parsing the Broma files? What would be the purpose of such script outside of that?
There's also the topic of Cocos2d.bro being incomplete because Geode SDK already provides complete headers for use, and the same Broma file makes use Geode SDK headers for some platform specific class definitions