[PATCH][libstdc++-v3 parallel mode] Fix name collision PR libstdc++/37470

[Paolo Carlini]

> On Thu, 18 Sep 2008, Johannes Singler wrote:
>
>> Uglification will continue...
>>
>> Tested x86_64-unknown-linux-gnu: No regressions
>>
>> Please approve for mainline.
>>
>> 2008-09-18  Johannes Singler  <singler@ira.uka.de>
>>
>>       PR libstdc++/37470
>>       * include/parallel/base.h: Rename log2 to __log2.
>> 	  (__log2) Avoid infinite loop for n <= 0, return 0.
>>       * include/parallel/losertree.h: Rename log2 to __log2.
>>       * include/parallel/multiseq_selection.h: Likewise.
>>       * include/parallel/random_shuffle.h: Likewise.

I think this is OK for mainline, for 4.4.x that is. Please commit the  
patch and close the PR.

Many thanks,
Paolo.