Updated TargetFrameworkVersion for Android platforms to v4.2.
Updated TargetFrameworkVersion for Android platforms to v4.2.

hach-que/Protobuild,silasary/Protobuild,silasary/Protobuild,Protobuild/Protobuild,Protobuild/Protobuild,silasary/Protobuild,hach-que/Protobuild,Protobuild/Protobuild,Protobuild/Protobuild,Protobuild/Protobuild,hach-que/Protobuild