{demux_mf,osdep/io}: disable glob usage when it is not available

This currently is only limited to Android. Its stdlib contains the
things that mpv's POSIX check checks for, but unfortunately not
glob().

This fixes Android compilation broken in 70a70b9da .

demux/demux_mf.c

@@ -115,6 +115,7 @@ static mf_t *open_mf_pattern(void *talloc_ctx, struct mp_log *log, char *filenam
 
     char *fname = talloc_size(mf, strlen(filename) + 32);
 
+#if HAVE_GLOB
     if (!strchr(filename, '%')) {
         strcpy(fname, filename);
         if (!strchr(filename, '*'))
@@ -137,6 +138,7 @@ static mf_t *open_mf_pattern(void *talloc_ctx, struct mp_log *log, char *filenam
         globfree(&gg);
         goto exit_mf;
     }
+#endif
 
     mp_info(log, "search expr: %s\n", filename);
 

osdep/io.h

@@ -28,7 +28,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
-#if HAVE_POSIX
+#if HAVE_GLOB_POSIX
 #include <glob.h>
 #endif