Moved the wpp library from tools/ to libs/.
Create symlinks to the various libraries in the libs directory.

diff --git a/configure.ac b/configure.ac
index a24e6dd..f6012e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1500,6 +1500,7 @@
 libs/unicode/Makefile
 libs/uuid/Makefile
 libs/wine/Makefile
+libs/wpp/Makefile
 miscemu/Makefile
 programs/Makefile
 programs/avitools/Makefile
@@ -1537,7 +1538,6 @@
 tools/winebuild/Makefile
 tools/winedump/Makefile
 tools/wmc/Makefile
-tools/wpp/Makefile
 tools/wrc/Makefile])
 
 AC_OUTPUT