Move makefile comment to separate line

One of the wonderful vagaries of GNU make is that adding a comment at
the end of an assignment will cause any trailing spaces before the
comment to end up in the variable.  This will cause problems if that
variable is later used as part of something that expects a single word,
such as ifdef.

Move the comment to the line above the assignment.

Change-Id: Idfa6c28c4941cd565e96b229c2eec9bb915d37ed
diff --git a/Android.mk b/Android.mk
index 1484f00..9573ef9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -36,7 +36,8 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src/junit/extensions)
 LOCAL_SRC_FILES += $(core-junit-files)
 LOCAL_SRC_FILES += $(junit-runner-files)
-LOCAL_MODULE := junit-targetdex # TODO: lose the suffix here and rename "junit" to "junit-hostdex"
+# TODO: lose the suffix here and rename "junit" to "junit-hostdex"
+LOCAL_MODULE := junit-targetdex
 LOCAL_NO_STANDARD_LIBRARIES := true
 LOCAL_JAVA_LIBRARIES := core-libart
 LOCAL_MODULE_TAGS := tests