Fix interrupt test: wait for exec to complete before continuing.
Fix interrupt test: wait for exec to complete before continuing.

tsufeki/node-sqlite3,tsufeki/node-sqlite3,t3mulligan/node-sqlite3,jBarz/node-sqlite3,mapbox/node-sqlite3,liubiggun/node-sqlite3,liubiggun/node-sqlite3,tomhughes/node-sqlite3,jBarz/node-sqlite3,tomhughes/node-sqlite3,mapbox/node-sqlite3,mapbox/node-sqlite3,jBarz/node-sqlite3,t3mulligan/node-sqlite3,liubiggun/node-sqlite3,tsufeki/node-sqlite3,t3mulligan/node-sqlite3,tsufeki/node-sqlite3,liubiggun/node-sqlite3,t3mulligan/node-sqlite3,mapbox/node-sqlite3,tomhughes/node-sqlite3,liubiggun/node-sqlite3,tomhughes/node-sqlite3,jBarz/node-sqlite3,tomhughes/node-sqlite3,t3mulligan/node-sqlite3,mapbox/node-sqlite3,mapbox/node-sqlite3,tomhughes/node-sqlite3,tsufeki/node-sqlite3,jBarz/node-sqlite3,liubiggun/node-sqlite3,jBarz/node-sqlite3,t3mulligan/node-sqlite3,tsufeki/node-sqlite3