Initial commit gsh.

N/A

Signed-off-by: liminghao <vgotoos@gmail.com>
Merge branch 'master' of https://github.com/gotoos/system-core

Conflicts:
	gsh/Gotoos.mk
	gsh/eval.c
	gsh/eval.h
	gsh/input.c
	gsh/input.h
	gsh/main.c
	gsh/memalloc.c
	gsh/memalloc.h
	gsh/nodes.h
	gsh/output.c
	gsh/output.h
	gsh/parser.c
	gsh/parser.h
	gsh/syntax.c
	gsh/syntax.h
	gsh/token.h