Introduce FLIPPER_ENABLE_ALL_GKS dev option
Introduce FLIPPER_ENABLE_ALL_GKS dev option

Summary: Was tired off figuring out GK's to be able to debug a plugin, so added a flag that allows me  to start Flipper with all plugins enabled :)

Reviewed By: passy

Differential Revision: D25301773

fbshipit-source-id: 668b92c4ddbbeb3f4b056035de394800bbfa5377

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper