refactor(ios): combine exists/mkdir calls into fs.ensureDir
refactor(ios): combine exists/mkdir calls into fs.ensureDir

mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile,mano-mykingdom/titanium_mobile