sci-libs/openblas: backport fix for building on arm

```
make -j40 -l90 -O shared
cpuid.S: Assembler messages:
cpuid.S:69: Error: junk at end of line, first unrecognized character is `,'
make[1]: *** [Makefile.prebuild💯 getarch] Error 1
make[1]: Entering directory '/var/tmp/portage/sci-libs/openblas-0.3.30-r4/work/OpenBLAS-0.3.30/interface'
armv7a-unknown-linux-gnueabihf-gcc -O2 -pipe -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard  [...]  -c axpy.c -o saxpy.o
In file included from axpy.c:40:
../common.h:62:10: fatal error: config.h: No such file or directory
   62 | #include "config.h"
      |          ^~~~~~~~~~
compilation terminated.
make[1]: *** [Makefile:825: saxpy.o] Error 1
```

Bug: https://github.com/OpenMathLib/OpenBLAS/pull/5360
Signed-off-by: Eli Schwartz <eschwartz@gentoo.org>

sci-libs/openblas/files/openblas-0.3.30-arm-assembly.patch

@@ -0,0 +1,28 @@
+From 8d11e4630c1e92437636d016f35ad48395b62b4f Mon Sep 17 00:00:00 2001
+From: Sertonix <sertonix@posteo.net>
+Date: Sun, 6 Jul 2025 23:48:10 +0200
+Subject: [PATCH] Fix cpuid.S on arm
+
+The ARM assembly syntax differs a bit
+
+Fixes 61b9339d3a1f getarch/cpuid.S: Fix warning about executable stack
+
+Signed-off-by: Sertonix <sertonix@posteo.net>
+---
+ cpuid.S | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/cpuid.S b/cpuid.S
+index 295917bdbe..a8f5f8b573 100644
+--- a/cpuid.S
++++ b/cpuid.S
+@@ -66,5 +66,9 @@ _cpuid:
+ 
+ #endif
+ #if defined(__ELF__) && defined(__linux__)
++#if defined(__arm__)
++        .section        .note.GNU-stack,"",%progbits
++#else
+         .section        .note.GNU-stack,"",@progbits
+ #endif
++#endif

sci-libs/openblas/openblas-0.3.30-r4.ebuild

@@ -34,6 +34,8 @@ PATCHES=(
 	"${FILESDIR}/${P}-cmake_libdir.patch"
 	# https://github.com/OpenMathLib/OpenBLAS/pull/5378
 	"${FILESDIR}/${P}-lunar-lake.patch"
+	# https://github.com/OpenMathLib/OpenBLAS/pull/5360
+	"${FILESDIR}/${P}-arm-assembly.patch"
 )
 
 pkg_pretend() {