large symbol file support

_From [derek.br...@gmail.com](https://code.google.com/u/117968039472581148324/) on December 10, 2010 17:58:24_

PR 583343

for symbol files that don't fit in memory (some combination of large or
many symbol files and significant memory usage by the application) the plan
is to use sideline processing which needs support from issue #44/PR 243532.

may also want to support the post-processing model that is now supported on
Linux via two-step -skip_results/-results invocations (PR 575481)

xref PR 540913: online symbol processing
xref issue #44/PR 243532: [API] symbol table lookup support

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=192_