[PATCH] Fix for gdb.base/stap-probe.c

[Carl Love <cel@us.ibm.com>]

GDB maintainers:

The gdb.base/stap-probe.exp test fails on Power 10 with a compile error
due to a missing include file.  The include file provides the
definition for ATTRIBUTE_NOCLONE.  The following patch add the missing
include file.  

The test now runs on Power 10 with 98 expected passes and 4 unsupported
tests.

Please let me know if this patch is acceptable for mainline.

                        Carl Love

---------------------------------------------------------------------
Fix for gdb.base/stap-probe.c

On PowePC, the test fails on a compile error:

  /../binutils-gdb-current/gdb/testsuite/gdb.base/stap-probe.c:107:1: error: expected '=', ',', ';', 
  'asm' or 'attribute' before 'use_xmm_reg'
  107 | use_xmm_reg (int val)
  | ^~~~~~~~~~~

Where the source code for stap-probe.c is:

  ...
  static const char * __attribute__((noinline)) ATTRIBUTE_NOCLONE
  use_xmm_reg (int val)                         <-- line 107
  {
  ...

The issue is the ATTRIBUTE_NOCLONE is not defined as an attribute as
expected.  The #define for ATTRIBUTE_NOCLONE can be found in
../lib/attributes.h.

This patch adds the missing include statement for the definition of
ATTRIBUTE_NOCLONE.

The patch has been tested and verified on a Power10 system.
---
 gdb/testsuite/gdb.base/stap-probe.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gdb/testsuite/gdb.base/stap-probe.c b/gdb/testsuite/gdb.base/stap-probe.c
index d1482c35caf..527f7e187eb 100644
--- a/gdb/testsuite/gdb.base/stap-probe.c
+++ b/gdb/testsuite/gdb.base/stap-probe.c
@@ -15,6 +15,8 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include "../lib/attributes.h"
+
 #if USE_SEMAPHORES
 
 #define _SDT_HAS_SEMAPHORES
-- 
2.31.1