Add J2ObjC.podspec v0.8.8

Change-Id: I96eea3881e2d69d76dc76269ad0751a94ce63bfb
Use fixed header for generated files.

Change-Id: Ie274fb909f8e3b7bb01a4287db39ab91211faf17
Fix method parameters > 2 omitted when using mapping file

Change-Id: I603ad1d6af2298cfa850f6e2c13d1fded9f568b7