Enhanced partition file rebuild is now supported via three modes:
Call RBLIFILX8() for the partition host which will force the host and all partitions to be rebuilt.
Call RBLIFILX8() for the partition host with tfilno set to badpartIFIL (which cannot be combined with updateIFIL), and, if the host is clean, it will only rebuild partitions that are not clean.
Call PTADMIN() for a specified partition using ptADMINrebuild mode.
For the first two modes of rebuild that use RBLIFILX8(), the XCREblk argument must be included as we check the x8mode member of XCREblk for partition attributes.
