Include limits.h on Android to work around NDK deficiency

src/libFLAC/md5.c

 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
 
 #include <stdlib.h>             /* for malloc() */
 #include <string.h>             /* for memcpy() */
 
 #include "private/md5.h"
 #include "share/alloc.h"
+#include "share/compat.h"
 #include "share/endswap.h"
 
 /*
  * This code implements the MD5 message-digest algorithm.
  * The algorithm is due to Ron Rivest.  This code was
  * written by Colin Plumb in 1993, no copyright is claimed.
  * This code is in the public domain; do with it what you wish.
  *
  * Equivalent code is available from RSA Data Security, Inc.
  * This code has been tested against that, and is equivalent,
@@ skipping 489 matching lines @@
                         ctx->internal_buf.p8= tmp;
                 ctx->capacity = bytes_needed;
         }
 
         format_input_(&ctx->internal_buf, signal, channels, samples, bytes_per_sample);
 
         FLAC__MD5Update(ctx, ctx->internal_buf.p8, bytes_needed);
 
         return true;
 }