Better header in Ninja file.

backends.py

@@ -276,7 +276,8 @@ class NinjaBackend(Backend):
         outfile = open(tempfilename, 'w')
         self.generate_configure_files()
         outfile.write('# This is the build file for project "%s"\n' % self.build.get_project())
-        outfile.write('# It is autogenerated. Do not edit by hand.\n\n')
+        outfile.write('# It is autogenerated by the Meson build system.\n')
+        outfile.write('# Do not edit by hand.\n\n')
         self.generate_rules(outfile)
         outfile.write('# Build rules for targets\n\n')
         [self.generate_target(t, outfile) for t in self.build.get_targets().values()]