dev-libs/ncnn: fix build with avx512

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

dev-libs/ncnn/files/ncnn-20241226-avx512.patch

@@ -0,0 +1,16 @@
+Quick fix for build with -march that enables avx512f.
+
+This is not where ncnn would include this though, it seems to have
+tendency to put headers not where they're used by in every files
+before including this.
+--- a/src/layer/x86/gemm_int8.h
++++ b/src/layer/x86/gemm_int8.h
+@@ -13,4 +13,8 @@
+ // specific language governing permissions and limitations under the License.
+ 
++#if __AVX512F__
++#include "avx512_mathfun.h"
++#endif
++
+ #if NCNN_RUNTIME_CPU && NCNN_AVX512VNNI && __AVX512F__ && !__AVX512VNNI__
+ void pack_A_tile_int8_avx512vnni(const Mat& A, Mat& AT, int i, int max_ii, int k, int max_kk);

dev-libs/ncnn/ncnn-20241226.ebuild

@@ -41,6 +41,10 @@ BDEPEND="
 
 DOCS=( README.md docs/. )
 
+PATCHES=(
+	"${FILESDIR}"/${P}-avx512.patch
+)
+
 pkg_pretend() {
 	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
 }