Mark oc-dev-plus-aosp OPR1 as REL

It contains all of oc-dev, which has OPR1 marked as REL, so we should be
using API 26 instead of 'O'.

Test: Check PLATFORM_VERSION_CODENAME / PLATFORM_SDK_VERSION
Change-Id: I0e8f3b42b8ac60422f0a8b044de45ba03b0bcfcf
Merged-In: I036cc43c1f2aa5317ae1131dc31a1f96caa5081f
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index e54e16a..ba4b9e4 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -84,7 +84,7 @@
 
 # This is the current development code-name, if the build is not a final
 # release build.  If this is a final release build, it is simply "REL".
-PLATFORM_VERSION_CODENAME.OPR1 := O
+PLATFORM_VERSION_CODENAME.OPR1 := REL
 PLATFORM_VERSION_CODENAME.PPR1 := P
 
 ifndef PLATFORM_VERSION