linux-drive: handle empty vendor/model/serial when building object pa…

[qiuxinyidian]

linux-drive: handle empty vendor/model/serial when building object path, Some NVMe devices expose empty Vendor/Model/Serial strings instead of NULL
fix:#1507

[qiuxinyidian]

when check with udevadm info xxx , this nvme has no ID_SERIAL ID_MODEL ID_SERIAL_SHORT info

[qiuxinyidian]

[root ]# udevadm info /dev/nvme0n1
P: /devices/pci0000:40/0000:40:03.1/0000:41:00.0/nvme/nvme0/nvme0n1
M: nvme0n1
R: 1
U: block
T: disk
D: b 259:0
N: nvme0n1
L: 0
S: disk/by-path/pci-0000:41:00.0-nvme-1
S: disk/by-id/nvme-uuid.e123f8b9-9d01-0000-3e50-56f434050000
S: disk/by-diskseq/117
Q: 117
E: DEVPATH=/devices/pci0000:40/0000:40:03.1/0000:41:00.0/nvme/nvme0/nvme0n1
E: DEVNAME=/dev/nvme0n1
E: DEVTYPE=disk
E: DISKSEQ=117
E: MAJOR=259
E: MINOR=0
E: SUBSYSTEM=block
E: USEC_INITIALIZED=55796653636
E: ID WWN=uuid.e123f8b9-9d01-0000-3e50-56f434050000
E: IDIREVISION=2.0.12
E: ID NSID=1
E: ID PATH=pci-0000:41:00.0-nvme-1
E: ID_PATH_TAG=pci-0000_41_00_0-nvme-1
E: MPATH_SBIN_PATH=/sbin
E: DM_MULTIPATH_DEVICE_PATH=0
E: UDISKS IGNORE=1
E: DEVLINKS=/dev/disk/by-path/pci-0000:41:00.0-nvme-1/dev/disk/by-id/nvmeuuid.e123f8b9-9d01-0000-3e50-56f434050000/dev/dis>
E: TAGS=:systemd:
E: CURRENT_TAGS=:systemd: