[tlbuild] xpdf 4.05 import broken

[Akira Kakuto]

Hi Norbert,

On 2024/02/10 16:41, Norbert Preining wrote:
> Hi Kakuto-sensei,
> 
> the recent import of new xpdf seems to have been missing something, the
> builds are failing with
> 
> config.status: creating aconf.h
> config.status: linking ../../../libs/xpdf/xpdf-src/aconf2.h to aconf2.h
> config.status: error: ../../../libs/xpdf/xpdf-src/aconf2.h: file not found
> === configuring in xpdf failed

I forgot to remove aconf2.h in Makefile.am.
However I reverted to xpdf 4.04, since pdftex did not work correctly
in my test on Windows. Of course, the bad things must be my changes.

Best,
Akira