[committed][sim] Fix mbuild build breaker in sim-cpu.c

[Tom de Vries <tdevries@suse.de>]

Hi,

When running gdb/gdb_mbuild.sh, I run into:
...
src/sim/aarch64/../common/sim-cpu.c: In function 'sim_cpu_free':
src/sim/aarch64/../common/sim-cpu.c:64:3: error: implicit declaration of \
  function 'free' [-Werror=implicit-function-declaration]
   free (cpu);
   ^~~~
src/sim/aarch64/../common/sim-cpu.c:64:3: error: incompatible implicit \
  declaration of built-in function 'free' [-Werror]
src/sim/aarch64/../common/sim-cpu.c:64:3: note: include '<stdlib.h>' or \
  provide a declaration of 'free'
...

Fix this by adding "#include <stdlib.h>".

Tested by gdb/gdb_mbuild.sh -e aarch64-elf.

Committed to trunk.

Thanks,
- Tom

[sim] Fix mbuild build breaker in sim-cpu.c

sim/common/ChangeLog:

2020-08-10  Tom de Vries  <tdevries@suse.de>

	* sim-cpu.c: Include stdlib.h for free.

---
 sim/common/sim-cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sim/common/sim-cpu.c b/sim/common/sim-cpu.c
index 1715508e2f..d1676d4831 100644
--- a/sim/common/sim-cpu.c
+++ b/sim/common/sim-cpu.c
@@ -17,6 +17,8 @@ GNU General Public License for more details.
 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 <stdlib.h>
+
 #include "sim-main.h"
 #include "bfd.h"