Fix for "dexopt: No such file or directory" error

When common_javalib.jar is created, both LOCAL_BUILT_MODULE and
built_odex targets can be run.

If built_odex target runs before the directory is created by
LOCAL_BUILT_MODULE target, the error occurs.

Change-Id: I1ebcb27630f8373558da6acdfce95f5cdf714bbf
diff --git a/core/java_library.mk b/core/java_library.mk
index fa40c0e..c210be6 100644
--- a/core/java_library.mk
+++ b/core/java_library.mk
@@ -90,6 +90,7 @@
 $(built_odex) : $(common_javalib.jar) | $(DEXPREOPT) $(DEXOPT)
 	@echo "Dexpreopt Jar: $(PRIVATE_MODULE) ($@)"
 	$(hide) rm -f $@
+	@mkdir -p $(dir $@)
 	$(call dexpreopt-one-file,$<,$@)
 
 $(LOCAL_BUILT_MODULE) : $(common_javalib.jar) | $(ACP) $(AAPT)