PatchMasterKey: merge from MasterKeyDualFix (now multi-fix)
- Add 2 missing signal checks in getInputStream
- Use original RAFStream and ZipInflaterInputStream to prevent problems with libcore variations
- Cumulative patches to catch up with android-4.4_r1, closing some additional MK exploits

Thanks to Tungstwenty@XDA
Merge pull request #250 from bgcngm/master

PatchMasterKey: merge from MasterKeyDualFix (now multi-fix)