kbuild: trivial - use tabs for code indent where possible

scripts/basic/fixdep.c

scripts/docproc.c

scripts/kallsyms.c

scripts/kconfig/conf.c

scripts/kconfig/gconf.c

scripts/kconfig/lxdialog/checklist.c

scripts/kconfig/lxdialog/inputbox.c

scripts/kconfig/lxdialog/menubox.c

scripts/kconfig/lxdialog/util.c

scripts/kconfig/mconf.c

scripts/kconfig/menu.c

scripts/kconfig/zconf.l

scripts/kconfig/zconf.lex.c_shipped

scripts/kconfig/zconf.tab.c_shipped

scripts/kconfig/zconf.y

scripts/mod/file2alias.c

scripts/mod/modpost.c

scripts/mod/sumversion.c

scripts/tags.sh