kbuild: trivial - remove trailing empty lines

scripts/Makefile.asm-generic

scripts/Makefile.host

scripts/checkstack.pl

scripts/config

scripts/dtc/.gitignore

scripts/dtc/fstree.c

scripts/dtc/libfdt/fdt_empty_tree.c

scripts/dtc/treesource.c

scripts/headers.sh

scripts/kconfig/Makefile

scripts/kconfig/check.sh

scripts/kconfig/mconf.c

scripts/kconfig/nconf.c

scripts/kconfig/util.c

scripts/markup_oops.pl

scripts/mksysmap

scripts/mod/.gitignore

scripts/mod/mk_elfconfig.c

scripts/package/Makefile

scripts/package/buildtar