The r11 of NDK removed dprintf.

diff -u -r ../busybox-1.24.1/include/platform.h ./include/platform.h
--- ../busybox-1.24.1/include/platform.h	2015-07-13 04:18:47.000000000 +0200
+++ ./include/platform.h	2016-03-10 11:47:06.000000000 +0100
@@ -480,11 +480,7 @@
 #endif
 
 #if defined(ANDROID) || defined(__ANDROID__)
-# if __ANDROID_API__ < 8
-#  undef HAVE_DPRINTF
-# else
-#  define dprintf fdprintf
-# endif
+# undef HAVE_DPRINTF
 # if __ANDROID_API__ < 21
 #  undef HAVE_TTYNAME_R
 #  undef HAVE_GETLINE