Android's major/minor/makedev live in <sys/sysmacros.h>

Bug: https://github.com/android-ndk/ndk/issues/398
Test: builds
Change-Id: I4fcb9017ef5917890305760e27de164d7daf9685
diff --git a/Android.common.mk b/Android.common.mk
index f57b8d3..4637081 100644
--- a/Android.common.mk
+++ b/Android.common.mk
@@ -1,5 +1,6 @@
 # XXX: Consider moving these to config.h analogous to autoconf.
 LOCAL_CFLAGS += \
+	-DMAJOR_IN_SYSMACROS=1 \
 	-DHAVE_VISIBILITY=1 \
 	-DHAVE_LIBDRM_ATOMIC_PRIMITIVES=1