Add corelib/core/kernel/String_spec entry to spec/rubyspecs
Add corelib/core/kernel/String_spec entry to spec/rubyspecs

opal/opal,Ajedi32/opal,opal/opal,kachick/opal,Flikofbluelight747/opal,Mogztter/opal,c42engineering/opal,Ajedi32/opal,suyesh/opal,Mogztter/opal,gausie/opal,jannishuebl/opal,gausie/opal,merongivian/opal,wied03/opal,suyesh/opal,opal/opal,castwide/opal,gabrielrios/opal,kachick/opal,fazibear/opal,Mogztter/opal,wied03/opal,kachick/opal,jgaskins/opal,castwide/opal,c42engineering/opal,jgaskins/opal,jannishuebl/opal,bbatsov/opal,jgaskins/opal,fazibear/opal,gabrielrios/opal,gabrielrios/opal,wied03/opal,iliabylich/opal,Flikofbluelight747/opal,Mogztter/opal,Flikofbluelight747/opal,fazibear/opal,castwide/opal,kachick/opal,c42engineering/opal,iliabylich/opal,bbatsov/opal,jannishuebl/opal,merongivian/opal,Ajedi32/opal,suyesh/opal,opal/opal,iliabylich/opal,bbatsov/opal,gausie/opal,merongivian/opal