config: enable GNU extensions to get isblank()
config: enable GNU extensions to get isblank()

Signed-off-by: Eduardo Silva <b6525c140147034c280e3cd2f39161f32f3f4f62@gmail.com>

sujayraaj/monkey,dreamsxin/monkey,monkey/monkey,dreamsxin/monkey,monkey/monkey,sujayraaj/monkey_rtems,WilliamRen/monkey-1,monkey/monkey,sujayraaj/monkey_rtems,monkey/monkey,sbagmeijer/monkey,sbagmeijer/monkey,sbagmeijer/monkey,WilliamRen/monkey-1,WilliamRen/monkey-1,WilliamRen/monkey-1,dougsko/monkey,dougsko/monkey,dreamsxin/monkey,dreamsxin/monkey,sujayraaj/monkey_rtems,sujayraaj/monkey_rtems,sujayraaj/monkey,sujayraaj/monkeyTest,dougsko/monkey,monkey/monkey,sujayraaj/monkeyTest,sujayraaj/monkey,sbagmeijer/monkey,sujayraaj/monkey,sujayraaj/monkey_rtems,sbagmeijer/monkey,dougsko/monkey,WilliamRen/monkey-1,dreamsxin/monkey,sujayraaj/monkeyTest,sujayraaj/monkey,monkey/monkey,sujayraaj/monkeyTest,dougsko/monkey