Disable warnings about MS deprecation of C library

Define macros

 _CRT_NONSTDC_NO_DEPRECATE
 _CRT_SECURE_NO_DEPRECATE
 _CRT_SECURE_NO_WARNINGS
 _SCL_SECURE_NO_DEPRECATE

for all translation units in KWSys.  Drop definitions from Configure.h
that are now redundant.

Change-Id: I326a1edb6c5a8ab977ecd2370eed6fcdf4775208