Add C compilation tests for Windows
Add C compilation tests for Windows

Add C compilation tests: egs_exit.c NameDecoration.c and file_size.c

Since mingw will be used for ALL the Windows components, one can now
include these during the configuration phase. Up until now we had
to keep an old w2k system with the Microsoft cl compiler to build the
GUIs and the C object files.

Removed SECNDS from the declaration as it is meant to be a system
intrinsic.

ftessier/EGSnrc,ftessier/EGSnrc,crcrewso/EGSnrc,nrc-cnrc/EGSnrc,marenaud/EGSnrc,crcrewso/EGSnrc,MartinMartinov/EGSnrc,ftessier/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,marenaud/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,nrc-cnrc/EGSnrc,marenaud/EGSnrc,mchamberland/EGSnrc,MartinMartinov/EGSnrc,marenaud/EGSnrc,crcrewso/EGSnrc,mchamberland/EGSnrc,nrc-cnrc/EGSnrc,ftessier/EGSnrc,marenaud/EGSnrc,MartinMartinov/EGSnrc,crcrewso/EGSnrc,marenaud/EGSnrc,ftessier/EGSnrc,nrc-cnrc/EGSnrc,nrc-cnrc/EGSnrc,ftessier/EGSnrc,mchamberland/EGSnrc,mchamberland/EGSnrc