Add std namespace use
Add std namespace use

On linux, the lib won't install because of the use of std functions (memcpy and sleep) without declaring the std namespace.
ZECTBynmo/node-core-audio,ZECTBynmo/node-core-audio,GeorgeStrakhov/node-core-audio,ZECTBynmo/node-core-audio,GeorgeStrakhov/node-core-audio,GeorgeStrakhov/node-core-audio,GeorgeStrakhov/node-core-audio,ZECTBynmo/node-core-audio