MT#55447 always annotate .S for non-exec stack

Change-Id: If19f18c84f2450c9ae38472cfa59032c679437f9

lib/mvr2s_x64_avx2.S

@@ -1,9 +1,11 @@
+#if defined(__linux__) && defined(__ELF__)
+.section	.note.GNU-stack,"",@progbits
+#endif
+
 #if defined(__x86_64__)
 
 .global mvr2s_avx2
 
-.section	.note.GNU-stack,"",@progbits
-
 .text
 
 	# void mvr2s_avx2(float *in, const uint16_t len, int16_t *out);

lib/mvr2s_x64_avx512.S

@@ -1,9 +1,11 @@
+#if defined(__linux__) && defined(__ELF__)
+.section	.note.GNU-stack,"",@progbits
+#endif
+
 #if defined(__x86_64__)
 
 .global mvr2s_avx512
 
-.section	.note.GNU-stack,"",@progbits
-
 .text
 
 	# void mvr2s_avx512(float *in, const uint16_t len, int16_t *out);