Fix to "make ddmlib ddmuilib" under Windows/Cygwin.

Needed by the latest change to sdk.git/eclipse/script/create_ddms*.sh

Change-Id: I6dfbb418cc8813c7cdfbc077705158424220724f
diff --git a/core/main.mk b/core/main.mk
index 09f8e5a..14817c2 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -407,6 +407,7 @@
 	sdk/sdkstats \
 	sdk/sdkmanager \
 	sdk/layoutopt \
+	sdk/ddms \
 	development/apps \
 	development/tools/mkstubs \
 	packages