Final patch for libstdc++ _M_open_mode and related

[Zack Weinberg]

Benjamin Kosnik <bkoz@redhat.com> writes:

>>  Oh, and as requested
>>the baseline-symbols.txt changes are dropped from the 3.4 patch.
>>ChangeLogs remain the same, mostly.
>
> Sorry I wasn't as clear as was necessary: don't do any baseline symbol
> changes, on any branch. At all. Drop all those bits, period.
>
> Please revert the mainline baseline symbols changes. 

Done.  Sorry about that.

zw