lex: add \ character into regexp for ID token
lex: add \ character into regexp for ID token

Having virtual machine up, group name contains \ character after
cgsnapshot output. lex.l does not consider this case. For example:
group machine.slice/machine-qemu\x2drhel6.4.scope {...}
Adding \ character into regexp for ID token resolves this problem.


Signed-off-by: Jan Chaloupka <fb7b75872f1a877dbe4139a6016b66e619a17cb9@redhat.com>
Acked-by: Dhaval Giani <f48451d72a1ad74c777093928b661ad7099a85df@gmail.com>

rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg