libbb: mark stack in assembly files read-only

Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/hash_md5_sha256_x86-32_shaNI.S b/libbb/hash_md5_sha256_x86-32_shaNI.S
index 3905bad..a0e4a57 100644
--- a/libbb/hash_md5_sha256_x86-32_shaNI.S
+++ b/libbb/hash_md5_sha256_x86-32_shaNI.S
@@ -19,6 +19,9 @@
 // We do not check SSSE3 in cpuid,
 // all SHA-capable CPUs support it as well.
 
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha256_process_block64_shaNI, "ax", @progbits
 	.globl	sha256_process_block64_shaNI
 	.hidden	sha256_process_block64_shaNI