pimd: adjust the display for debug

pimd: adjust the display for debug

The vrf name should be separated when it is displayed. And remove
unnecessary space after number.

Before:
```
pim_upstream_sg_running: (100.100.1.100,232.100.100.100)x is not installed in mroute
pim_upstream_del(pim_ifchannel_delete): Delete (100.100.1.100,232.100.100.100)[x] ref count: 1 , flags: 1048585 c_oil ref count 2 (Pre decrement)
```

After:
```
pim_upstream_sg_running: (100.100.1.100,232.100.100.100)[x] is not installed in mroute
pim_upstream_del(pim_ifchannel_delete): Delete (100.100.1.100,232.100.100.100)[x] ref count: 1, flags: 1048585 c_oil ref count 2 (Pre decrement)
```

Signed-off-by: anlan_cs <vic.lan@pica8.com>