[cscope][vim] vim - Load cscope database

1. Please do reference 1

2. Put cscope_maps.vim under
~/.vim/bundle/multi-cscope-db/plugin

3. Go to the folder of code.
Create cscope.out. Ref [Bash] Create cscope.out and tags by using script

4. Edit source code
vim happy.c
:Loadcs ## Load database (cscope.out)

5. cscope command. Ref [cscope][vim] How to install cscope into vim

Reference:
1. [VIM] How to install vundle by script