libzmf: __ANDROID__, not ANDROID

The former is defined by GCC, the latter by gbuild -D$(OS)

Change-Id: I5960f8f74defcab964729c4deca5b1a988125d24
diff --git a/external/libzmf/0001-add-missing-include.patch.1 b/external/libzmf/0001-add-missing-include.patch.1
index c5ddfe9..ff1dc2a 100644
--- a/external/libzmf/0001-add-missing-include.patch.1
+++ b/external/libzmf/0001-add-missing-include.patch.1
@@ -18,7 +18,7 @@ index ded93c7..7e024b3 100644
 
+#include <cmath>
+
+#if defined(ANDROID)
+#if defined(__ANDROID__)
+namespace std
+{
+template<typename T>