Modify app.mk for compilation in Bash on Ubuntu on Windows
Modify app.mk for compilation in Bash on Ubuntu on Windows

closes #10087

harterj/moose,laagesen/moose,YaqiWang/moose,laagesen/moose,sapitts/moose,permcody/moose,milljm/moose,idaholab/moose,idaholab/moose,idaholab/moose,andrsd/moose,sapitts/moose,harterj/moose,idaholab/moose,permcody/moose,andrsd/moose,dschwen/moose,bwspenc/moose,YaqiWang/moose,permcody/moose,friedmud/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,lindsayad/moose,harterj/moose,YaqiWang/moose,milljm/moose,laagesen/moose,lindsayad/moose,SudiptaBiswas/moose,sapitts/moose,laagesen/moose,lindsayad/moose,dschwen/moose,milljm/moose,jessecarterMOOSE/moose,friedmud/moose,SudiptaBiswas/moose,friedmud/moose,idaholab/moose,sapitts/moose,milljm/moose,bwspenc/moose,nuclear-wizard/moose,dschwen/moose,nuclear-wizard/moose,nuclear-wizard/moose,milljm/moose,harterj/moose,andrsd/moose,lindsayad/moose,nuclear-wizard/moose,sapitts/moose,jessecarterMOOSE/moose,permcody/moose,friedmud/moose,bwspenc/moose,andrsd/moose,lindsayad/moose,harterj/moose,jessecarterMOOSE/moose,bwspenc/moose,dschwen/moose,YaqiWang/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,andrsd/moose,bwspenc/moose,dschwen/moose,laagesen/moose,SudiptaBiswas/moose