Lose HAVE_ANDROID_OS from hardware/libhardware.

Change-Id: I9f6bd154479e368aab0ff20798676d9cd409955c
diff --git a/modules/gralloc/framebuffer.cpp b/modules/gralloc/framebuffer.cpp
index 486e27a..eadcdaa 100644
--- a/modules/gralloc/framebuffer.cpp
+++ b/modules/gralloc/framebuffer.cpp
@@ -33,7 +33,7 @@
 #include <cutils/log.h>
 #include <cutils/atomic.h>
 
-#if HAVE_ANDROID_OS
+#ifdef __ANDROID__
 #include <linux/fb.h>
 #endif