2nd attempt to Add the ability to build without trashing the source tree

In r13510 I had neglected to build with all local libraries and some of
them needed attention.

So, I also took the opportunity to work out the locale directory and
how to keep it unmolested as well.  As a result, all locales are rebuilt
as expected, but into the "build" directory.

As a bonus you may now test Audacity from the "build" directory and have
Nyquist plugins and message catalogs available (so you can test other 
languages again without havint to install).

So, again:

mkdir buildme
cd buildme
../configure
make
./audacity

lib-src/audacity-patches.txt

@@ -42,6 +42,7 @@ arguments ([-Wall foreign]) added to AM_INIT_AUTOMAKE to avoid autoreconf
 failures
 arguments (--no-verify) removed from ltconfig execution to prevent configure
 failures
+Patches: libid3tag-srcdir.patch  Adds srcdir handling
 
 libmad
 ------
@@ -90,6 +91,7 @@ Patches: endian.m4, lrint.m4, llrint.m4, lrintf.m4, clip_mode.m4 copied from
 		 signal.m4 created out of the tail of acinclude.m4 with the remaining
 		 	necessary macro
          autotools.patch: Fix autotools warnings.
+         libsndfile-srcdir.patch: Add srcdir handling
 AM_MAINTAINER_MODE has been added to configure.ac to disable autotools rebuilds
 by default
 Upstream Version: 0.1.8
@@ -186,7 +188,7 @@ Patches:
 ../portmixer/portaudio.patch	add features needed to make portmixer work
 		Integration by upstream in progress. Will need updating as upstream
 		portaudio moves
-
+portaudio-srcdir.patch  Adds srcdir handling
 portaudio-v19/wasapi-fix.patch  Patch to WASAPI hostapi that corrects incorrect
 reporting of stream open/running/closed state.