use named variant when allocating msgb's

when we generate a talloc report (SIGUSR1), we can now see which system
allocated a given msgb, this helps memory leak debugging
11 files changed
tree: f7bc3c7ac76e2c63ad4a1f5190ed218ab53c2c6b
  1. linux-kernel/
  2. openbsc/
  3. wireshark/