tree 0df790810b1c2a3798d4f24d3663eaae392c1ec1
parent 077ad05a3f871fe3dee3ee77ed1cd111228eb8b5
author Rich Kadel <richkadel@google.com> 1546896223 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1546905594 +0000

Improved xcode-select check.

Fixed typo ("xcode-select install" does not work. The command should be:
"xcode-select --install".)

Added logic to check for the need to install the xcode command line
tools, and a new check for possible need to "switch" xcode-select
to the command line tools. (CommandLineTools directory contains
/usr/include and C++ header files, but the XCode application
developer directory does not.)

Added new info message to let the user know that their environment
looks good, if there were no issues found.

Change-Id: I37aab02d33145e34c51b87a3feca959324187fd7