RC version for build-tools.

Because the branch is still 19/20+codename but we
want to release 21.0.0 rc1 we remove the placeholder
temporarily.

Change-Id: I8016b23e27aa5673f0632d83ab1c8e70024ed8f7

sdk/build_tools_source.prop_template

@@ -1,3 +1,5 @@
 Pkg.UserSrc=false
-Pkg.Revision=${PLATFORM_SDK_VERSION}.0.0
+// due to the codename this resolve to 20 instead of 21, so replace it with hardcoded version for now.
+//Pkg.Revision=${PLATFORM_SDK_VERSION}.0.0
+Pkg.Revision=21.0.0 rc1
 

sdk/support_source.prop_template

@@ -1,5 +1,5 @@
 Pkg.UserSrc=false
-Pkg.Revision=${PLATFORM_SDK_VERSION}
+Pkg.Revision=${PLATFORM_SDK_VERSION}.0.0
 Extra.Vendor=android
 Extra.VendorId=android
 Extra.VendorDisplay=Android