Version bump to PPR1.180507.001

Change-Id: I1c1b089d30fd48b6a7cb5958b414b1be5df89fd7
diff --git a/core/build_id.mk b/core/build_id.mk
index 1874239..d2627aa 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=PPR1.180506.001
+export BUILD_ID=PPR1.180507.001