Fixed missing source folder in build script.
Fixed missing source folder in build script.

alkacon/opencms-core,gallardo/opencms-core,ggiudetti/opencms-core,ggiudetti/opencms-core,gallardo/opencms-core,alkacon/opencms-core,alkacon/opencms-core,gallardo/opencms-core,ggiudetti/opencms-core,gallardo/opencms-core,ggiudetti/opencms-core,alkacon/opencms-core