package/stress-ng: bump to version 0.13.1

package/stress-ng: bump to version 0.13.1

This will fix the following build failure with glibc >= 2.34 thanks to
https://github.com/ColinIanKing/stress-ng/commit/7c4f74761089177127c2cfe6685b7886aa231885

core-helper.c: In function 'stress_sighandler':
core-helper.c:1340:31: error: storage size of 'stack' isn't constant
 1340 |   static uint8_t MLOCKED_DATA stack[SIGSTKSZ + STACK_ALIGNMENT];
      |                               ^~~~~

https://github.com/ColinIanKing/stress-ng/blob/V0.13.01/debian/changelog

Fixes:
 - http://autobuild.buildroot.org/results/3c2d624d1af776162978a6a72343bc04448d2885

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>