SDK: Generate source packages as part of 'make sdk_repo'

Change-Id: Iaea55bae22b2af95993d0f97023a015f2c5a5e77
diff --git a/sdk/source_source.properties b/sdk/source_source.properties
new file mode 100644
index 0000000..7cb1d33
--- /dev/null
+++ b/sdk/source_source.properties
@@ -0,0 +1,4 @@
+Pkg.UserSrc=false
+Pkg.Revision=1
+AndroidVersion.ApiLevel=14
+#AndroidVersion.CodeName=