Atlas thunk bx elf pic detection

...d on ebx).  this delta simply identifies the "getEbx" function, identifies the base that ebx should point to generically, and sets that in workspace metadata variable "PIE_ebx".  each time a 32-bit PIE binary wants to access relative offset data, it calls this "getEbx" function, which returns 
i've only ever seen one.  this is just proof of what was found, in case of misidentification.  eventually, this probably just folds away, but i like to have the details of what actually happened.