Make build system less annoying about google-breakpad HOT 2 CLOSED

Again, I'm only including changes to the top-level source in this diff.  With 
this
patch, objects and executables are moved to the directories of the related 
source,
and libairbag is moved into src.  The missing m4 files are added so aclocal can 
find
them in a checked-out tree.  As much of the autotools auxiliary tools have been 
moved
into the autotools directory as possible, cleaning out the top-level directory 
and
making it look like less of a general dumping ground.

Application: apply the patch, then sanitize the source tree (some of these 
files will
be removed, the rest will be regenrated, possibly in new locations):
$ rm -r INSTALL Makefile.in aclocal.m4 compile config.guess config.sub configure
depcomp install-sh ltmain.sh missing mkinstalldirs src/config.h.in

Regenerate new files:
$ autoreconf -i
$ rm -r autom4te.cache

Remove dropped/moved files:
$ svn remove compile config.guess config.sub depcomp install-sh ltmain.sh 
missing
mkinstalldirs

Add new/moved files:
$ svn add autotools/config.guess autotools/config.sub autotools/depcomp
autotools/install-sh autotools/ltmain.sh autotools/m4/google_namespace.m4
autotools/m4/namespaces.m4 autotools/m4/stl_namespace.m4 autotools.missing

Fixed in [8].