* gdb.ada/gnat_ada.gpr: New file.

    * gdb.ada/gnat_ada.gpr: New file.
        * gdb.ada/gnat_ada.gin: Delete, no longer used.
        * lib/ada.exp (gdb_compile_ada): Minor adaptation to new project file.
        * configure.ac: No longer generate gnat_ada.gpr.
        * configure: Regenerate.
        * gdb.ada/Makefile.in: Minor adaptations due to new project file.
        * gdb.ada/null_record/null_record.adb: Moved here from gdb.ada.
        * gdb.ada/null_record/bar.ads: Likewise.
        * gdb.ada/null_record/bar.adb: Likewise.
        * gdb.ada/fixed_points/fixed_points.adb: Likewise.
        * gdb.ada/null_record.exp (testdir): New variable.
        (testfile): executable is now in testdir subdirectory.
        (srcfile): Use full path to the main compilation unit.
        * gdb.ada/fixed_points.exp: Same changes as above.