Move platform-tools SDK component rev to 3

Change-Id: I243f703ba76d63e9116c9f99c8cf80a7b1f6285e
diff --git a/sdk/plat_tools_source.properties b/sdk/plat_tools_source.properties
index 9528e79..f23e52a 100644
--- a/sdk/plat_tools_source.properties
+++ b/sdk/plat_tools_source.properties
@@ -1,2 +1,2 @@
 Pkg.UserSrc=false
-Pkg.Revision=2
+Pkg.Revision=3