[Ada] always generate unix-style sources in xtreeprs, xnmake

[Arnaud Charlet <charlet at adacore dot com>]

Tested on i686-linux, committed on HEAD

The utility programs xnmake and xtreeprs used Text_IO to generate the
Ada output files (nmake.ads nmake.adb treeprs.ads) used in the build.
This means that they were generated with DOS line endings on windows,
which is wrong since we expect all GNAT sources to always have Unix
style line endings. Furthermore the new -gnatyd switch tests for this
and so this is now essential to fix. It has been fixed by using Stream_IO
instead of Text_IO for output, and writing the appropriate unix-style
line terminators explicitly

2005-03-29  Robert Dewar  <dewar@adacore.com>

	* xtreeprs.adb, xnmake.adb: Use Stream_IO instead of Text_IO to
	guarantee Unix style line terminators for the output files, even when
	running on windows.

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