Version bump to OPR3.170623.012

Change-Id: I5ac24edadc8d359ea62aa09a1fd44685ef4b0f00
diff --git a/core/build_id.mk b/core/build_id.mk
index 35db630..93b0647 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=OPR3.170623.011
+export BUILD_ID=OPR3.170623.012