Minor, fix relative path in PhutilLibraryMapBuilder
Minor, fix relative path in PhutilLibraryMapBuilder

hach-que/arcanist,sneakpeeq/arcanist,haskell-infra/arcanist,phacility/arcanist,kevinseelbach/arcanist,fivestars/arcanist,fivestars/arcanist,julkiewicz/arcanist,Khan/arcanist,dguo-coursera/arcanist,folsom-labs/arcanist,aik099/arcanist,uber/arcanist,hach-que/arcanist,memsql/arcanist,PageUpPeopleOrg/arcanist-patches,phacility/arcanist,codelabs-ch/arcanist,alexmv/arcanist,memsql/arcanist,phacility/arcanist,dguo-coursera/arcanist,kevinseelbach/arcanist,aik099/arcanist,Symplicity/arcanist,uber/arcanist,jra3/arcanist,coursera/arcanist,KieranHayes/arcanist,fivestars/arcanist,dguo-coursera/arcanist,julkiewicz/arcanist,coursera/arcanist,codelabs-ch/arcanist,wharris/arcanist,alexmv/arcanist,wikimedia/phabricator-arcanist,chundongwang/arcanist,calblueprint/arcanist,KieranHayes/arcanist,alexmv/arcanist,kevinseelbach/arcanist,memsql/arcanist,uber/arcanist,haskell-infra/arcanist,folsom-labs/arcanist,coursera/arcanist,jra3/arcanist,memsql/arcanist,fivestars/arcanist,zhihu/arcanist,chundongwang/arcanist,Khan/arcanist,hach-que/arcanist,wharris/arcanist,kevinseelbach/arcanist,jra3/arcanist,haskell-infra/arcanist,r4nt/arcanist,r4nt/arcanist,Symplicity/arcanist,folsom-labs/arcanist,wxstars/arcanist,coursera/arcanist,eSpark/arcanist,phacility/arcanist,chundongwang/arcanist,Symplicity/arcanist,wharris/arcanist,wharris/arcanist,sneakpeeq/arcanist,eSpark/arcanist,PageUpPeopleOrg/arcanist-patches,Symplicity/arcanist,Khan/arcanist,wikimedia/phabricator-arcanist,aik099/arcanist,PageUpPeopleOrg/arcanist-patches,wxstars/arcanist,calblueprint/arcanist,aik099/arcanist,r4nt/arcanist,codelabs-ch/arcanist,zhihu/arcanist,haskell-infra/arcanist,wikimedia/phabricator-arcanist,Khan/arcanist,zhihu/arcanist,wxstars/arcanist,KieranHayes/arcanist,codelabs-ch/arcanist,zhihu/arcanist,r4nt/arcanist,jra3/arcanist,eSpark/arcanist,eSpark/arcanist,KieranHayes/arcanist,sneakpeeq/arcanist,codelabs-ch/arcanist,folsom-labs/arcanist,PageUpPeopleOrg/arcanist-patches,calblueprint/arcanist,chundongwang/arcanist,uber/arcanist,calblueprint/arcanist,alexmv/arcanist,hach-que/arcanist,wikimedia/phabricator-arcanist,julkiewicz/arcanist,julkiewicz/arcanist,phacility/arcanist,wxstars/arcanist,sneakpeeq/arcanist,dguo-coursera/arcanist