Fixes for build on IBM pSeries for AIX and Linux

[nobody]

This is a fix to allow building Boost on pSeries to 
work better. This fixes problem with the building of 
dynamic libraries and shared objects. It also adds a 
bunch of the latest option supported by the V8 
compiler. This unified diff patch has been tested on 
1.33.1 and CVS.

[biochimia]

Logged In: YES 
user_id=840777

This is a duplicate of issue [1446471] and dgregor has
already commented on that one.

Closing this one.