Since OC-DR is also API26, it should be REL

Since OC is API26/REL now.

Bug: 38502482
Test: source build/envsetup.sh && lunch marlin-userdebug && m -j40
Change-Id: I4b44160cc4845975d8e6b0c2cfcb2dec69434716
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 7308f85..f9e36a9 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -85,7 +85,7 @@
 
 # These are the current development codenames, if the build is not a final
 # release build.  If this is a final release build, it is simply "REL".
-PLATFORM_VERSION_CODENAME.OPD1 := ODR
+PLATFORM_VERSION_CODENAME.OPD1 := REL
 PLATFORM_VERSION_CODENAME.OPM1 := OMR1
 PLATFORM_VERSION_CODENAME.PPR1 := P