fixup script

Author: ianfixes

exe/ci_system_check.rb

@@ -30,7 +30,7 @@
 got_problem = true unless arduino_cmd.install_library("USBHost")
 got_problem = true unless arduino_cmd.library_is_indexed
 
-got_problem = true unless arduino_cmd.set_pref(compiler.warning_level, "all")
+got_problem = true unless arduino_cmd.set_pref("compiler.warning_level", "all")
 
 abort if got_problem
 exit(0)