tools: add zip utility

One image requires a zip compressed image, so add the zip util found in
the packages feed, and extend it with some useful debian patches.

Signed-off-by: Mathias Kresin <dev@kresin.me>

tools/zip/patches/007-fclose-in-file-not-fclose-x.patch

@@ -0,0 +1,16 @@
+From: Christian Spieler
+Subject: zipnote.c: Close in_file instead of undefined file x
+Bug-Debian: http://bugs.debian.org/628594
+X-Debian-version: 3.0-4
+
+--- a/zipnote.c
++++ b/zipnote.c
+@@ -661,7 +661,7 @@ char **argv;            /* command line
+     if ((r = zipcopy(z)) != ZE_OK)
+       ziperr(r, "was copying an entry");
+   }
+-  fclose(x);
++  fclose(in_file);
+ 
+   /* Write central directory and end of central directory with new comments */
+   if ((c = zftello(y)) == (zoff_t)-1)    /* get start of central */