Version bump to OPR2.170623.026

Change-Id: I8bf0bcabec67d778e93f31364973c3e51c0dea22
diff --git a/core/build_id.mk b/core/build_id.mk
index e3d0b06..fca660c 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=OPR2.170623.025
+export BUILD_ID=OPR2.170623.026