Merge "Fix HOST_TOOLCHAIN_PREFIX"

# Previously the prebiult host toolchain is used only for the sdk build,

# that's why we have "sdk" in the path name.

ifeq ($(strip $(HOST_TOOLCHAIN_PREFIX)),)

HOST_TOOLCHAIN_PREFIX := prebuilts/tools/gcc-sdk

HOST_TOOLCHAIN_PREFIX := prebuilts/tools/gcc-sdk/

endif

# Don't do anything if the toolchain is not there

ifneq (,$(strip $(wildcard $(HOST_TOOLCHAIN_PREFIX)/gcc)))

HOST_CC  := $(HOST_TOOLCHAIN_PREFIX)/gcc

HOST_CXX := $(HOST_TOOLCHAIN_PREFIX)/g++

HOST_AR  := $(HOST_TOOLCHAIN_PREFIX)/ar

endif # $(HOST_TOOLCHAIN_PREFIX)/gcc exists

ifneq (,$(strip $(wildcard $(HOST_TOOLCHAIN_PREFIX)gcc)))

HOST_CC  := $(HOST_TOOLCHAIN_PREFIX)gcc

HOST_CXX := $(HOST_TOOLCHAIN_PREFIX)g++

HOST_AR  := $(HOST_TOOLCHAIN_PREFIX)ar

endif # $(HOST_TOOLCHAIN_PREFIX)gcc exists

ifneq ($(strip $(BUILD_HOST_64bit)),)

# By default we build everything in 32-bit, because it gives us