Add emacs format strings to lib/commont_stubs.c

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Rework Makefile again

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Add 'Common.unshadow' function to merge shadow back into passwd

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>