Add patch to work around OpenBLAS v0.3.5 SkylakeX problems

X-ref: #30583
X-ref: OpenMathLib/OpenBLAS#1955

deps/blas.mk

@@ -94,7 +94,12 @@ OPENBLAS_BUILD_OPTS += MAKE_NB_JOBS=0
 
 ifneq ($(USE_BINARYBUILDER_OPENBLAS), 1)
 
-$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-configured: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/source-extracted
+$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-skylakexdgemm.patch-applied: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/source-extracted
+	cd $(BUILDDIR)/$(OPENBLAS_SRC_DIR) && \
+		patch -p1 -f < $(SRCDIR)/patches/openblas-skylakexdgemm.patch
+	echo 1 > $@
+
+$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-configured: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-skylakexdgemm.patch-applied
 	perl -i -ple 's/^\s*(EXTRALIB\s*\+=\s*-lSystemStubs)\s*$$/# $$1/g' $(dir $<)/Makefile.system
 	echo 1 > $@
 

deps/patches/openblas-skylakexdgemm.patch

@@ -0,0 +1,22 @@
+diff --git a/kernel/x86_64/KERNEL.SKYLAKEX b/kernel/x86_64/KERNEL.SKYLAKEX
+index acc6356d..ad0f8973 100644
+--- a/kernel/x86_64/KERNEL.SKYLAKEX
++++ b/kernel/x86_64/KERNEL.SKYLAKEX
+@@ -7,12 +7,12 @@ SGEMMITCOPY    =  sgemm_tcopy_16_skylakex.c
+ SGEMMONCOPY    =  sgemm_ncopy_4_skylakex.c
+ SGEMMOTCOPY    =  ../generic/gemm_tcopy_4.c
+
+-DGEMMKERNEL    =  dgemm_kernel_4x8_skylakex.c
++#DGEMMKERNEL    =  dgemm_kernel_4x8_skylakex.c
+
+-DGEMMINCOPY    =  dgemm_ncopy_8_skylakex.c
+-DGEMMITCOPY    =  dgemm_tcopy_8_skylakex.c
+-DGEMMONCOPY    =  dgemm_ncopy_8_skylakex.c
+-DGEMMOTCOPY    =  dgemm_tcopy_8_skylakex.c
++#DGEMMINCOPY    =  dgemm_ncopy_8_skylakex.c
++#DGEMMITCOPY    =  dgemm_tcopy_8_skylakex.c
++#DGEMMONCOPY    =  dgemm_ncopy_8_skylakex.c
++#DGEMMOTCOPY    =  dgemm_tcopy_8_skylakex.c
+
+ SGEMM_BETA = sgemm_beta_skylakex.c
+ DGEMM_BETA = dgemm_beta_skylakex.c