Problem with configure when trying to build gcc 5.3

I got mingw-pkg installed and started working on gcc 5.3.0

I immediately found a problem when mingw-pkg did a configure.
It did not configure to build the Ada compiler. I found nothing obvious
that would explain this in config.log, so I went to the MinGW installer
to see if I had anything missing and found that the mingw-gnat dll is 
still at version 4.8.1-4 and the repository version number is
also 4.8.1-4.

I have only built one Ada program since I upgraded to gcc 5.3.0,
and it compiles and runs with no problems, but this does look a bit
odd, and I suspect that the gcc configure may be  more demanding 
about runtime library compatibility than my little program is.

There was also a 4.8.1-4 version number on the 
mingw32-gcc-ada info file.



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