package/xxhash: fix uclibc build

Fix the following uclibc build failure raised since bump to version
0.8.1 in commit 5dbdb2535c649ee617595b8c4ae3cbba0ee37b97:

/home/buildroot/autobuild/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/microblazeel-buildroot-linux-uclibc/10.3.0/../../../../microblazeel-buildroot-linux-uclibc/bin/ld: xxhash.o: in function `XXH3_hashLong_128b_internal.constprop.0':
(.text+0xcbc): undefined reference to `static_assert'

Fixes:
 - http://autobuild.buildroot.org/results/559/5595b21a711b482b84e582fc9f56e5468c9eb6d6/build-end.log

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/xxhash/0003-do-no-longer-depend-on-assert-h-for-XXH_STATIC_ASSERT.patch

@@ -0,0 +1,29 @@
+From 6189ecd3d44a693460f86280ccf49d33cb4b18e1 Mon Sep 17 00:00:00 2001
+From: Yann Collet <cyan@fb.com>
+Date: Sun, 26 Dec 2021 15:15:26 -0800
+Subject: [PATCH] do no longer depend on `<assert.h>` for XXH_STATIC_ASSERT
+
+since some versions are buggy.
+
+Use `_Static_assert` instead, which is part of the C11 language.
+[Retrieved from:
+https://github.com/Cyan4973/xxHash/commit/6189ecd3d44a693460f86280ccf49d33cb4b18e1]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ xxhash.h | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/xxhash.h b/xxhash.h
+index 311a69c7..5dfd5c45 100644
+--- a/xxhash.h
++++ b/xxhash.h
+@@ -1749,8 +1749,7 @@ static void* XXH_memcpy(void* dest, const void* src, size_t size)
+ /* note: use after variable declarations */
+ #ifndef XXH_STATIC_ASSERT
+ #  if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)    /* C11 */
+-#    include <assert.h>
+-#    define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { static_assert((c),m); } while(0)
++#    define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { _Static_assert((c),m); } while(0)
+ #  elif defined(__cplusplus) && (__cplusplus >= 201103L)            /* C++11 */
+ #    define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { static_assert((c),m); } while(0)
+ #  else