Ports/diffutils: Update diffutils to version 3.8

The fnmatch patch that was added in 6de6dff is reverted because it is
not clear why it is necessary, as discussed in #9206.

This also removes diffutils from the list of ports missing descriptions
as it no longer has any patches.

Ports/diffutils/package.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env -S bash ../.port_include.sh
 port=diffutils
-version=3.7
-files="https://ftpmirror.gnu.org/gnu/diffutils/diffutils-${version}.tar.xz diffutils-${version}.tar.xz b3a7a6221c3dc916085f0d205abf6b8e1ba443d4dd965118da364a1dc1cb3a26"
+version=3.8
+files="https://ftpmirror.gnu.org/gnu/diffutils/diffutils-${version}.tar.xz diffutils-${version}.tar.xz a6bdd7d1b31266d11c4f4de6c1b748d4607ab0231af5188fc2533d0ae2438fec"
 auth_type=sha256
 useconfigure=true
 use_fresh_config_sub=true

Ports/diffutils/patches/fnmatch.patch

@@ -1,14 +0,0 @@
-diff -Naur gettext-0.21/gettext-tools/gnulib-lib/fnmatch_loop.c gettext-0.21.serenity/gettext-tools/gnulib-lib/fnmatch_loop.c
---- diffutils-3.7/lib/fnmatch_loop.c	2020-06-26 21:57:10.000000000 +0200
-+++ diffutils-3.7.serenity/lib/fnmatch_loop.c	2021-05-08 05:06:59.944736766 +0200
-@@ -19,6 +19,10 @@
- 
- /* Match STRING against the file name pattern PATTERN, returning zero if
-    it matches, nonzero if not.  */
-+#ifdef __serenity__
-+# define FNM_EXTMATCH 9000
-+#endif
-+
- static int EXT (INT opt, const CHAR *pattern, const CHAR *string,
-                 const CHAR *string_end, bool no_leading_period, int flags)
-      internal_function;