Please allow gnat-4.3 into testing and lenny

[Ludovic Brenta <ludovic@ludovic-brenta.org>]

Please allow gnat-4.3 into testing as it corrects one RC bug (#492866). The changelog entry follows. Note that I did not merge gcc-4.3 (=4.3.1-9)
because I wanted to minimise the changes not related to Ada. However, if there is good reason to merge, I'll be happy to do it after 4.3.1-2 hits
testing.

 gnat-4.3 (4.3.1-2) unstable; urgency=low
 .
   [Ludovic Brenta]
   * Add sdefault.ads to libgnatprj4.3-dev.  Closes: #492866.
   * turn gnatvsn.gpr and gnatprj.gpr into proper library project files.
   * Unconditionally build-depend on gnat.  Closes: #487564.
   * (debian/rules.d/binary-ada.mk): Add a symlink libgnat.so to
     /usr/lib/libgnat-4.3.so in the adalib directory.  Closes: #493814.
   * (debian/patches/ada-sjlj.dpatch): remove dangling symlinks from all
     adalib directories.
 .
   [Samuel Tardieu, Ludovic Brenta]
   * debian/patches/pr16086.dpatch: new; backport from GCC 4.4.
     Closes: #248172.
   * debian/patches/pr35792.dpatch: new; backport from GCC 4.4.

-- 
Ludovic Brenta.