Ubuntu GCC version numbers

[Andrew Stubbs]

Hi all,

I've just discovered that Ubuntu is not using the Linaro release 
information in the --version string. This is not ideal when we get bug 
reports as it makes it hard to understand what Linaro release to use to 
reproduce the issue.

Therefore, I've created a new wiki page to track the mappings:

   https://wiki.linaro.org/WorkingGroups/ToolChain/VersionMappings

For now this only applies to GCC, but no doubt other tools will follow.

Please help keep it up to date if you find a version is missing. I've 
added it to the GCC release process wiki page, so hopefully it should 
get looked at at least once a month.

Andrew