osdep: make use of HAVE_ANDROID

osdep/io.h

@@ -33,7 +33,7 @@
 #include <glob.h>
 #endif
 
-#ifdef __ANDROID__
+#if HAVE_ANDROID
 #  include <unistd.h>
 #  include <stdio.h>
 
@@ -58,7 +58,7 @@ static inline int mp_fseeko(FILE* fp, off64_t offset, int whence) {
 }
 #define fseeko(f,p,w) mp_fseeko((f), (p), (w))
 
-#endif // __ANDROID__
+#endif // HAVE_ANDROID
 
 #ifndef O_BINARY
 #define O_BINARY 0

osdep/posix-spawn.h

@@ -19,7 +19,9 @@
 
 #pragma once
 
-#ifdef __ANDROID__
+#include "config.h"
+
+#if HAVE_ANDROID
 // posix_spawn(p) does not exist at all on Android
 #include "osdep/android/posix-spawn.h"
 #else

osdep/strnlen.h

@@ -20,7 +20,9 @@
 #ifndef MP_OSDEP_STRNLEN
 #define MP_OSDEP_STRNLEN
 
-#ifdef __ANDROID__
+#include "config.h"
+
+#if HAVE_ANDROID
 // strnlen is broken on current android ndk, see https://code.google.com/p/android/issues/detail?id=74741
 #include "osdep/android/strnlen.h"
 #define strnlen freebsd_strnlen