Merge "Forbid Clang for Windows"

# clang is enabled by default for host builds

# enable it unless we've specifically disabled clang above

ifdef LOCAL_IS_HOST_MODULE

    ifneq ($($(my_prefix)OS),windows)

    ifeq ($($(my_prefix)OS),windows)

        ifeq ($(my_clang),true)

            $(error $(LOCAL_MODULE_MAKEFILE): $(LOCAL_MODULE): Clang is not yet supported for windows binaries)

        endif

        my_clang := false

    else

        ifeq ($(my_clang),)

            my_clang := true

        endif