Make `Machine::systemTypes` a set not vector (cherry picked from commit f1b030415376e81c5804647c055d71eaba4aa725) Change-Id: I6d4f5c0bfc226e9bd66c58c360cd99e3fac9a129
Make `Machine::systemTypes` a set not vector (cherry picked from commit f1b030415376e81c5804647c055d71eaba4aa725) Change-Id: I6d4f5c0bfc226e9bd66c58c360cd99e3fac9a129