Add support for module versioning of Dolphin kernel modules
With the change to enable kernel module versioning of symbols, we need to add support for finding the Module.symvers file for the compiled Dolphin vendor code to replace the current values (all 0x00000000) in ExtraSymbols.symvers
See https://alog.ligo-la.caltech.edu/TST/index.php?callRep=13048