autoreconf seems not available on macOS

Author: eregon

mx.truffleruby/mx_truffleruby.py

@@ -135,7 +135,8 @@ def getBuildTask(self, args):
 
 class YARPNativeBuildTask(mx.NativeBuildTask):
     def build(self):
-        mx.run(['autoreconf'], cwd=self.subject.dir)
+        mx.run(['autoconf'], cwd=self.subject.dir)
+        mx.run(['autoheader'], cwd=self.subject.dir)
         mx.run(['./configure'], cwd=self.subject.dir)
         super(YARPNativeBuildTask, self).build() # make