psm: add .note.GNU-stack section as executable stack is not needed (#136)

On GNU/Linux, when linking an executable comprising a static library
created by cargo because Cargo.toml contains crate-type = ["staticlib"]
the linker outputs the following warning:

```
/nix/store/dc9vaz50jg7mibk9xvqw5dqv89cxzla3-binutils-2.44/bin/ld: warning: 4f9a91766097c4c5-x86_64.o: missing .note.GNU-stack section implies executable stack
/nix/store/dc9vaz50jg7mibk9xvqw5dqv89cxzla3-binutils-2.44/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
```

(where 4f9a91766097c4c5-x86_64.o is the object corresponding to
psm/src/arch/x86_64.s)

Add the note requested by the linker.

For some reason, executables linked directly by rustc do not seem
affected. I only observed this with a c++ project linking a rust static
library comprising psm (lnav).

Author: symphorien

psm/src/arch/aarch_aapcs64.s

@@ -1,4 +1,5 @@
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 

psm/src/arch/arm_aapcs.s

@@ -1,4 +1,5 @@
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 .syntax unified

psm/src/arch/gnu_stack_note.s

@@ -0,0 +1,3 @@
+#if defined(__linux__) && defined(__ELF__)
+.section .note.GNU-stack,"",%progbits
+#endif

psm/src/arch/loongarch64.s

@@ -1,4 +1,5 @@
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 .globl rust_psm_stack_direction

psm/src/arch/mips64_eabi.s

@@ -8,6 +8,7 @@ http://www.cygwin.com/ml/binutils/2003-06/msg00436.html
 */
 
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .set noreorder /* we’ll manage the delay slots on our own, thanks! */
 

psm/src/arch/mips_eabi.s

@@ -8,6 +8,7 @@ http://www.cygwin.com/ml/binutils/2003-06/msg00436.html
 */
 
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .set noreorder /* we’ll manage the delay slots on our own, thanks! */
 

psm/src/arch/powerpc32.s

@@ -1,4 +1,5 @@
 #include "psm.h"
+#include "gnu_stack_note.s"
 /* FIXME: this probably does not cover all ABIs? Tested with sysv only, possibly works for AIX as
    well?
 */

psm/src/arch/powerpc64.s

@@ -7,6 +7,7 @@
 */
 
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 .globl rust_psm_stack_direction

psm/src/arch/powerpc64_openpower.s

@@ -6,6 +6,7 @@
 */
 
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 .abiversion 2

psm/src/arch/riscv.s

@@ -1,4 +1,5 @@
 #include "psm.h"
+#include "gnu_stack_note.s"
 
 .text
 .globl rust_psm_stack_direction