move ccache dir to staging_dir_arch (removing the staging dir will make the ccache ineffective anyway)

SVN-Revision: 4999

openwrt/Makefile

@@ -132,7 +132,7 @@ dirclean: clean
 	rm -rf staging_dir_* toolchain_build_* tool_build
 
 distclean: dirclean config-clean
-	rm -rf dl .*config* .pkg* .prereq ccache_*
+	rm -rf dl .*config* .pkg* .prereq 
 
 .SILENT: clean dirclean distclean config-clean download world
 FORCE: ;

openwrt/rules.mk

@@ -60,7 +60,7 @@ CP:=cp -fpR
 
 ifneq ($(CONFIG_CCACHE),)
   # FIXME: move this variable to a better location
-  export CCACHE_DIR=$(TOPDIR)/ccache_$(ARCH)
+  export CCACHE_DIR=$(STAGING_DIR)/ccache
   TARGET_CC:= ccache $(TARGET_CC)
 endif