fix: fail to run make deps on macOS

[nic-chen]

What this PR does / why we need it:

fix script and docs about install dependencies on macOS

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[moonming]

I remember openresty-openssl111 is a dependency of openresty, will it be installed automatically?

[lilien1010]

yep, or-openssl111 will be autoaticll installed when you install openresty

[nic-chen]

will update later

[membphis]

In the mac os scenario, we should do this:

1. Install lua 5.1: brew install lua@5.1
2. When calling the luarocks command in make deps, add the parameter --lua-dir=/usr/local/opt/lua@5.1, eg: luarocks --lua-dir=/usr/local/opt/lua@5.1 ***

[nic-chen]

In the mac os scenario, we should do this:

1. Install lua 5.1: brew install lua@5.1

2. When calling the luarocks command in make deps, add the parameter --lua-dir=/usr/local/opt/lua@5.1, eg: luarocks --lua-dir=/usr/local/opt/lua@5.1 ***

we use utils/linux-install-luarocks.sh to install luarocks, so we use luajit for luarock, and don't need to set lua 5.1 for it. @membphis

[nic-chen]

In the mac os scenario, we should do this:

1. Install lua 5.1: brew install lua@5.1
2. When calling the luarocks command in make deps, add the parameter --lua-dir=/usr/local/opt/lua@5.1, eg: luarocks --lua-dir=/usr/local/opt/lua@5.1 ***

update to use brew to install luarocks.

please have a look when you have time. @membphis

[membphis]

LGTM

@totemofwolf welcome to take a look and make a try with this PR, it should work for mac os.