Bug#156734: Build-Depends should accept gnat-3.2

[Jack Howarth]

Package: gcc-3.2
Version: 3.2ds0-0pre4

The Build-Depends in debian/control should have 

gnat-3.1 [!arm !hurd-i386 !m68k] | .gnat-3.2 [!arm !hurd-i386 !m68k] 

since gcc-3.2 might already be installed.