toolchain: respect CONFIG_VERSION_FILENAMES and add host system suffix

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 44311

target/toolchain/Makefile

@@ -13,10 +13,7 @@ include $(INCLUDE_DIR)/host.mk
 
 override MAKEFLAGS=
 
-PKG_OS:=$(word 2,$(subst -, ,$(shell $(HOSTCC) -dumpmachine)))
-PKG_CPU:=$(word 1,$(subst -, ,$(shell $(HOSTCC) -dumpmachine)))
-
-TOOLCHAIN_NAME:=OpenWrt-Toolchain-$(BOARD)-for-$(ARCH)$(ARCH_SUFFIX)-gcc-$(GCCV)$(DIR_SUFFIX)
+TOOLCHAIN_NAME:=OpenWrt-Toolchain-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))_gcc-$(GCCV)$(DIR_SUFFIX).$(HOST_OS)-$(HOST_ARCH)
 TOOLCHAIN_BUILD_DIR:=$(BUILD_DIR)/$(TOOLCHAIN_NAME)
 EXCLUDE_DIRS:=*/ccache \
 	*/initial \