Resolve logical volume name

[hayamiz]

If /dev/mapper/VolGroup00-LogVol00 or /dev/VolGroup00/LogVol00 is passed to perfmonger record via -d option, convert it to corresponding device name dm-x.

This is done by following steps:

1. Build device name dictionary by reading /proc/partitions
2. Parse input and identify the path of logical volume
3. stat(3) the volume and get major/minor number of the volume
4. Look up the dictionary build in step 1. with major/minor number