fixed go bindings, added makefiles

bindings/Makefile

bindings/const_generator.py

bindings/go/keystone/keystone-binding.go

bindings/go/keystone/keystone.go

bindings/go/keystone/keystone_constants_arm.go

bindings/go/keystone/keystone_constants_arm64.go

bindings/go/keystone/keystone_constants_hexagon.go

bindings/go/keystone/keystone_constants_keystone.go

bindings/go/keystone/keystone_constants_mips.go

bindings/go/keystone/keystone_constants_ppc.go

bindings/go/keystone/keystone_constants_sparc.go

bindings/go/keystone/keystone_constants_systemz.go

bindings/go/keystone/keystone_constants_x86.go

bindings/go/keystone/keystone_test.go