Reference the new prebuilt ccache location.

Change-Id: I4450a8254fe82ed3a670ce653f49381d9c075c8e
diff --git a/core/combo/select.mk b/core/combo/select.mk
index cdeb68a..803cfc0 100644
--- a/core/combo/select.mk
+++ b/core/combo/select.mk
@@ -66,7 +66,7 @@
   ifeq ($(HOST_OS)-$(BUILD_OS),windows-linux)
     CCACHE_HOST_TAG := linux-$(BUILD_ARCH)
   endif
-  ccache := prebuilt/$(CCACHE_HOST_TAG)/ccache/ccache
+  ccache := prebuilts/misc/$(CCACHE_HOST_TAG)/ccache/ccache
   # Check that the executable is here.
   ccache := $(strip $(wildcard $(ccache)))
   ifdef ccache