This fixes 'test_c_api', called from 'test_libbcc', from failing
if the name of the first symbol with the address of "strtok" in
libc as returned by bcc_symcache_resolve() is not "strtok" but
some other alias pointing to the same address. For glibc-2.25 on
powerpc, a mismatch occurs as the name of the first symbol with
the same address as that of "strtok" is "__GI_strtok". This can
be verified from the output of the nm tool on Fedora 26 ppc64le
as shown below.

  00000000000b59c0 t __GI_strtok
  00000000000b59c0 T strtok
Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>