lib-src/makefile.w32-in: Rework dependencies.

lib-src/makefile.w32-in: Rework dependencies.
($(BLD)/test-distrib.exe): Use LIB_SRC, not SRC.
(LIB_SRC, NT_INC, GNU_LIB, MS_W32_H, CONFIG_H, INTTYPES_H, NTLIB_H)
(SYSTIME_H): New macros.
(SRC): Redefine to point to src/, not current directory.
($(BLD)/ctags.$(O), $(BLD)/ebrowse.$(O), $(BLD)/emacsclient.$(O))
($(BLD)/etags.$(O), $(BLD)/hexl.$(O), $(BLD)/make-docfile.$(O))
($(BLD)/movemail.$(O), $(BLD)/ntlib.$(O), $(BLD)/pop.$(O))
($(BLD)/profile.$(O), $(BLD)/test-distrib.$(O)): Update dependencies.
($(BLD)/regex.$(O)): New dependency.