goldfish-opengl: fix build breakage

There has been some refactoring on master and it does not
consider the fact this project is shared by old branches.

This CL checks for PLATFORM_VERSION_CODENAME.PPR1 and make
adjustment to get it work on both master and older branches

Once the O is finalized as api 26 we can remove the CODENAME
hack

Change-Id: Ia49e31ec1fa045a77f32bd7da708d0334efdd755
diff --git a/Android.mk b/Android.mk
index c4b610a..a53f072 100644
--- a/Android.mk
+++ b/Android.mk
@@ -28,6 +28,10 @@
     EMUGL_COMMON_CFLAGS += -DGOLDFISH_HIDL_GRALLOC
 endif
 
+ifeq ($(PLATFORM_VERSION_CODENAME.PPR1),P)
+    EMUGL_COMMON_CFLAGS += -DEMULATOR_OPENGL_POST_O=1
+endif
+
 ifeq ($(shell test $(PLATFORM_SDK_VERSION) -lt 18 && echo PreJellyBeanMr2),PreJellyBeanMr2)
     ifeq ($(ARCH_ARM_HAVE_TLS_REGISTER),true)
         EMUGL_COMMON_CFLAGS += -DHAVE_ARM_TLS_REGISTER