Linux dumper: Don't record file boundary addresses as null-name SourceFileInfoList entries.
Linux dumper: Don't record file boundary addresses as null-name SourceFileInfoList entries.

STABS information introduces a compilation unit with an N_SO entry
whose address is the start address of the file and whose string is the
name of the compilation unit's main source file.  However, STABS
entries can only hold one address, so STABS indicates the compilation
unit's ending address with an N_SO entry whose name is empty.

Currently, the dumper's data structures simply create SourceFileInfo
structures with empty names for these end-of-unit N_SO entries.  We
want to remove STABS-specific characteristics from these structures so
that we can replace them with an input-format-independent structure.

This moves end-of-compilation-unit addresses out of the symbol table
structure, and into their own list of boundary addresses.

a=jimblandy
r=nealsid


git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@369 4c0a9323-5329-0410-9bdc-e9ce6186880e

Quiark/google-breakpad,wincent/Google-Breakpad,AlekSi/google-breakpad-mirror,colesbury/google-breakpad,hkratz/breakpad_track_svn,bittorrent/breakpad,bbcallen/google-breakpad,albertz/google-breakpad,mhoran/google-breakpad,bbcallen/google-breakpad,wincent/Google-Breakpad,hkratz/breakpad_track_svn,AlekSi/google-breakpad-mirror,mhoran/google-breakpad,albertz/google-breakpad,darwin/breakpad,wesen/google-breakpad,albertz/google-breakpad,mhoran/google-breakpad,Quiark/google-breakpad,colesbury/google-breakpad,albertz/google-breakpad,hkratz/breakpad_track_svn,Quiark/google-breakpad,colesbury/google-breakpad,bittorrent/breakpad,bbcallen/google-breakpad,bittorrent/breakpad,Quiark/google-breakpad,wesen/google-breakpad,albertz/google-breakpad,colesbury/google-breakpad,bittorrent/breakpad,bittorrent/breakpad,darwin/breakpad,bbcallen/google-breakpad,wesen/google-breakpad,albertz/google-breakpad,hkratz/breakpad_track_svn,wesen/google-breakpad,bbcallen/google-breakpad,wesen/google-breakpad,bbcallen/google-breakpad,bittorrent/breakpad,AlekSi/google-breakpad-mirror,colesbury/google-breakpad,wesen/google-breakpad,AlekSi/google-breakpad-mirror,mhoran/google-breakpad,hkratz/breakpad_track_svn,Quiark/google-breakpad,mhoran/google-breakpad,wincent/Google-Breakpad,AlekSi/google-breakpad-mirror,darwin/breakpad,mhoran/google-breakpad,bittorrent/breakpad,colesbury/google-breakpad,Quiark/google-breakpad,hkratz/breakpad_track_svn