Add debuggerd:signaller to allowed debuggerd domain cmds.

commit: f3dde2f869801f2b5f5fb9cd9ee1a9356a0a1726 added cmdnames for
debuggerd signal-sending processes which currently run in the debuggerd
domain.  Add them to the list of allowed processes.

Bug: 28062765
Change-Id: I03467c8af50d41855fed4add3fc9d3e4ef443948
1 file changed