scm: git: switch "-c core.quotepath=false" in git version above 1.7.2 or not (#5251).

The -c option was introduced in git version (1.7.2)
http://www.kernel.org/pub/software/scm/git/docs/RelNotes-1.7.2.txt

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5069 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/git_adapter.rb

@@ -337,7 +337,10 @@ module Redmine
 
         def scm_cmd(*args, &block)
           repo_path = root_url || url
-          full_args = [GIT_BIN, '--git-dir', repo_path, '-c', 'core.quotepath=false']
+          full_args = [GIT_BIN, '--git-dir', repo_path]
+          if self.class.client_version_above?([1, 7, 2])
+            full_args << '-c' << 'core.quotepath=false'
+          end
           full_args += args
           ret = shellout(full_args.map { |e| shell_quote e.to_s }.join(' '), &block)
           if $? && $?.exitstatus != 0