Add support for busybox stat by just using the GNU stat option format no matter what, as Alpine
doesn't ship BSD stat anyway.
--- a/afl-cmin
+++ b/afl-cmin
@@ -347,15 +347,8 @@
 
   # get list of input filenames sorted by size
   i = 0
-  # yuck, gnu stat is option incompatible to bsd stat
-  # we use a heuristic to differentiate between
-  # GNU stat and other stats
-  "stat --version 2>/dev/null" | getline statversion
-  if (statversion ~ /GNU coreutils/) {
-    stat_format = "-c '%s %n'" # GNU
-  } else {
-    stat_format = "-f '%z %N'" # *BSD, MacOS
-  }
+  # Both GNU stat and busybox stat use -c for the format
+  stat_format = "-c '%s %n'" # GNU, busybox
   cmdline = "(cd "in_dir" && find . \\( ! -name \".*\" -a -type d \\) -o -type f -exec stat "stat_format" \\{\\} + | sort -k1n -k2r)"
   #cmdline = "ls "in_dir" | (cd "in_dir" && xargs stat "stat_format" 2>/dev/null) | sort -k1n -k2r"
   #cmdline = "(cd "in_dir" && stat "stat_format" *) | sort -k1n -k2r"