Check for sqlite3.exe with a backslash (as a raw string).
Check for sqlite3.exe with a backslash (as a raw string).

Change-Id: I1daf3bea50a4d77d6a1b50ba14f5d306f9b31316
Reviewed-on: http://review.membase.org/4064
Reviewed-by: Dustin Sallings <1c08efb9b3965701be9d700d9a6f481f1ffec3ea@spy.net>
Tested-by: Thuan Nguyen <dd93f232af03ed745267dcfe2c487e201a5cbe53@gmail.com>

membase/ep-engine,hisundar/ep-engine,daverigby/kv_engine,membase/ep-engine,abhinavdangeti/ep-engine,zbase/ep-engine,daverigby/ep-engine,daverigby/ep-engine,abhinavdangeti/ep-engine,owendCB/ep-engine,abhinavdangeti/ep-engine,couchbaselabs/ep-engine,hisundar/ep-engine,sriganes/ep-engine,couchbase/ep-engine,couchbase/ep-engine,abhinavdangeti/ep-engine,membase/ep-engine,couchbaselabs/ep-engine,zbase/ep-engine,jimwwalker/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,owendCB/ep-engine,couchbaselabs/ep-engine,couchbase/ep-engine,jimwwalker/ep-engine,daverigby/kv_engine,couchbaselabs/ep-engine,daverigby/ep-engine,abhinavdangeti/ep-engine,jimwwalker/ep-engine,sriganes/ep-engine,hisundar/ep-engine,daverigby/ep-engine,teligent-ru/ep-engine,couchbase/ep-engine,zbase/ep-engine,sriganes/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,teligent-ru/ep-engine,couchbaselabs/ep-engine,sriganes/ep-engine,membase/ep-engine,zbase/ep-engine,owendCB/ep-engine,hisundar/ep-engine,daverigby/kv_engine,jimwwalker/ep-engine,zbase/ep-engine