COMP: Attempt to improve SlicerExecutionModel linking.

SlicerExecutionModel link to the ModuleDescriptionParser library
does not have consistent behavior.  After fiddling with some files,
without any changes, it will sometimes link.  An attempt was made
to improve the linking by fixing macros (WIN32 to _WIN32) but
this may not fix the problem.

Change-Id: I5ebeb9897b81c900cf7fc2ffcc30b128c473fbb2
Merge topic 'SEMWindows'

bbe68f5 COMP: Attempt to improve SlicerExecutionModel linking.