Reference the new prebuilt ccache location.

Change-Id: Id990e37b9d8803aa5a23c365076c4044ef4719af
diff --git a/Makefile.android b/Makefile.android
index 184179e..22d7438 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -105,7 +105,7 @@
   endif # HOST_OS == linux
 
   ifneq ($(USE_CCACHE),)
-    ccache := prebuilt/$(HOST_PREBUILT_TAG)/ccache/ccache
+    ccache := prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache
     ccache := $(strip $(wildcard $(ccache)))
     ifneq ($(ccache),$(firstword $(MY_CC)))
       MY_CC := $(ccache) $(MY_CC)