Declare that we do not need an executable stack

A special marker in the assembler file for the SSE kernel is needed to
allow to declare the stack non-executable, which was criticized by
the packaging tools of the openSUSE build service.

ELPA_2014.06/src/elpa2_kernels/elpa2_kernels_asm_x86_64.s

@@ -11,7 +11,6 @@
 # distributed along with the original code in the file "COPYING".
 #
 # --------------------------------------------------------------------------------------------------
-
         .globl double_hh_trafo_
         .globl single_hh_trafo_complex_
         .text
@@ -697,3 +696,6 @@ return2:
 #-------------------------------------------------------------------------------
 #-------------------------------------------------------------------------------
 #-------------------------------------------------------------------------------
+
+# Declare that we do not need an executable stack here
+	.section	.note.GNU-stack,"",@progbits