[BUG FIXES] const qualify PFAC_readPatternFromFile() filename, update to __ballot_sync to support newer GPU architectures#8

Arleee1 wants to merge 2 commits intopfac-lib:masterpfac-lib/PFAC:masterfrom

Arleee1:string_const_and_ballotArleee1/PFAC:string_const_and_ballotCopy head branch name to clipboard