Fix s390 kprobes support
Fix s390 kprobes support

Ever since Linux kernel commit aa0d6e70d, kprobes on s390 could no longer
be found due to a change in symbol names.
Symptom:
  $ ./tools/execsnoop.py
  cannot attach kprobe, probe entry may not exist
  [...]

Signed-off-by: Stefan Raspl <ae896fd762beb84d26b0dfbb5506e2724a27b6b9@linux.ibm.com>

iovisor/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,iovisor/bcc,tuxology/bcc,brendangregg/bcc,tuxology/bcc,iovisor/bcc,brendangregg/bcc,brendangregg/bcc,tuxology/bcc