check_libs: fix lsof output parsing for OpenVZ

check_libs sometimes parses files incorrectly
inside an OpenVZ container (wheezy host and guest, proxmox ve
2.6.32 kernel):

Running /usr/bin/lsof -F0 -n
adding bash(28081) because of [ (deleted)/tmp/tmpfXKFYTG]:
f1aul tREGG0x8002;0x0D0x6ds218i9441399k0n (deleted)/tmp/tmpfXKFYTG
adding bash(28081) because of [ (deleted)/tmp/tmpfXKFYTG]:
f2aul tREGG0x8002;0x0D0x6ds218i9441399k0n (deleted)/tmp/tmpfXKFYTG
adding puppet(28244) because of [ (deleted)/tmp/tmpfXKFYTG]:
f1aul tREGG0x8002;0x0D0x6ds218i9441399k0n (deleted)/tmp/tmpfXKFYTG
adding puppet(28244) because of [ (deleted)/tmp/tmpfXKFYTG]:
f2aul tREGG0x8002;0x0D0x6ds218i9441399k0n (deleted)/tmp/tmpfXKFYTG
The following processes have libs linked that were upgraded: root: bash
(28081), puppet (28244)

So in some cases there is a space in front of "(deleted)".
Attached is a patch that fixes this.

Thanks: Felix Geyer <felix.geyer@credativ.de>
Closes: #760373