[gold patch] Fix gold to match .data.rel.ro sections more carefully

[Cary Coutant]

>> 2012-05-23  Cary Coutant  <ccoutant@google.com>
>>
>> gold/
>>       * layout.cc (Layout::section_name_mapping): Match .data.rel.ro.*
>>       more carefully.
>
> This is OK.

Sorry, I committed this without noticing a couple of testsuite
failures. Adding the "." here caused sections named ".data.rel.ro" to
match the next entry in the table, which maps ".data.*" to ".data". I
need to make the mapping a bit smarter...

-cary