i#114: remove entries from post_call_table and call_site_table on module unload.  not yet removing on code modification so leaving issue open.
i#114: remove entries from post_call_table and call_site_table
on module unload.  not yet removing on code modification so
leaving issue open.

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@212 5b54908e-ead4-fc18-b48a-0285e6dbc711

rnk/drmemory,rnk/drmemory,rnk/drmemory,rnk/drmemory