Update Windows port to gnulib changes in 2012-07-06T21:07:46Z!eggert@cs.ucla.edu.

Update Windows port to gnulib changes in 2012-07-06T21:07:46Z!eggert@cs.ucla.edu.

* lib-src/makefile.w32-in ($(BLD)/ctags.$(O), $(BLD)/etags.$(O)):
Update dependencies.

* lib/makefile.w32-in (GNULIBOBJS): Add $(BLD)/c-ctype.$(O),
$(BLD)/c-strcasecmp.$(O) and $(BLD)/c-strncasecmp.$(O).
($(BLD)/c-ctype.$(O), $(BLD)/c-strcasecmp.$(O))
($(BLD)/c-strncasecmp.$(O)): New dependencies.

* src/makefile.w32-in (DISPEXTERN_H, $(BLD)/regex.$(O)):
Update dependencies.

* src/s/ms-w32.h [_MSC_VER]: Remove strcasecmp, strncasecmp.