Module API (#32).  r=waylonis, bryner
 - Introduces a standard API for dealing with modules.  MinidumpModule
   is now a concrete implementation of this API.  Code may interact with
   single modules using the CodeModule interface, and collections of
   modules using its container, the CodeModules interface.
 - CodeModule is used directly by SymbolSupplier implementations and
   SourceLineResolver.  Reliance on the specific implementation in
   MinidumpModule has been eliminated.
 - Module lists are now added to ProcessState objects.  Module references
   in each stack frame are now pointers to objects in these module lists.
 - The sample minidump_stackwalk tool prints the module list after printing
   all threads' stacks.

http://groups.google.com/group/airbag-dev/browse_frm/thread/a9c0550edde54cf8


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@74 4c0a9323-5329-0410-9bdc-e9ce6186880e
diff --git a/configure.ac b/configure.ac
index f1c2cc8..4ad927f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@
 AC_CONFIG_SRCDIR(README)
 AC_CONFIG_AUX_DIR(autotools)
 
-AM_INIT_AUTOMAKE(subdir-objects)
+AM_INIT_AUTOMAKE(subdir-objects tar-ustar)
 AM_CONFIG_HEADER(src/config.h)
 
 AC_PROG_CC