Version bump to OPR1.170518.002

Change-Id: I73004c917de1ba59641e4c52496f78ec7b7572ed
diff --git a/core/build_id.mk b/core/build_id.mk
index 437b92e..b6a558b 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=OPR1.170518.001
+export BUILD_ID=OPR1.170518.002