Print the Git version for EE specific check

Because we're highly depending on how Git works in those scripts
and we found the exact same script passed locally but not in CI?

https://gitlab.com/gitlab-org/gitlab-ee/issues/5960#note_72641299

Not that it must be Git version, but it would be nice if we could
have more debugging information.

scripts/ee-files-location-check

@@ -3,6 +3,7 @@
 require_relative 'ee_specific_check/ee_specific_check'
 
 include EESpecificCheck # rubocop:disable Style/MixinUsage
+git_version
 
 base = find_compare_base
 

scripts/ee-specific-lines-check

@@ -3,6 +3,7 @@
 require_relative 'ee_specific_check/ee_specific_check'
 
 include EESpecificCheck # rubocop:disable Style/MixinUsage
+git_version
 
 base = find_compare_base
 

scripts/ee_specific_check/ee_specific_check.rb

@@ -18,6 +18,10 @@ module EESpecificCheck
 
   module_function
 
+  def git_version
+    say run_git_command('--version')
+  end
+
   def say(message)
     puts "\n#{message}", "\n" # puts would eat trailing newline
   end