Make change and version bump to PPR1.180527.001

Change-Id: Ib44c37c28dcce877d9628f46237baf0d9340700c
diff --git a/core/build_id.mk b/core/build_id.mk
index 932e214..56ba1f6 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=PI
+export BUILD_ID=PPR1.180527.001