Version bump to RP1A.200720.006 [core/build_id.mk]

Change-Id: I871c0e47f39b95b3d9cf3b04f6b65c5791b865ce
diff --git a/core/build_id.mk b/core/build_id.mk
index c4b3108..bd92d5b 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.
 
-BUILD_ID=RP1A.200720.005
+BUILD_ID=RP1A.200720.006