Compiler: rearranging the deck chairs.

First of several steps to adopt the new source directory layout.  No
logic changes - just moved files around.

Change-Id: I087631f8aa23973e18da4dc7706249c490bee061
diff --git a/build/Android.common.mk b/build/Android.common.mk
index cd1d6da..dd83136 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -348,7 +348,7 @@
 
 LIBART_ENUM_OPERATOR_OUT_HEADER_FILES := \
 	src/base/mutex.h \
-	src/compiler/compiler_enums.h \
+	src/compiler/dex/compiler_enums.h \
 	src/dex_file.h \
 	src/dex_instruction.h \
 	src/gc/gc_type.h \