add git to dependencies

[Khatskevich]

Here is a dependency list for Debian-like systems

apt install -y build-essential cmake coreutils sed \
      libreadline-dev libncurses5-dev libyaml-dev libssl-dev \
      libcurl4-openssl-dev libunwind-dev libicu-dev \
      python python-pip python-setuptools python-dev \
      python-msgpack python-yaml python-argparse python-six python-gevent

I was creating docker image and caught the following error durinc cmake:

CMake Error at CMakeLists.txt:175 (message):                             
  Unable to retrive version from git or /var/tarantool/docker-build/VERSION                                                                        
  file.

Installing git fixes the issue.

[Khatskevich]

I have been building Tarantool inside of debian:unstable-slim docker image.
I believe it git can be simply added to requirement lists for Debian/Ubuntu, RHEL/CentOS/Fedora, FreeBSD. Not sure about Mac.

It is minor though because basically git is preinstalled or already installed by user (it is necessary if user clones tarantool)

[lenkis]

@llelik8 please add git to all OS-specific installation scripts here:
https://tarantool.io/en/doc/1.9/dev_guide/building_from_source.html

[Onvember]

Done in #1989