libpaper: update to 2.2.5.

Release v2.2.5

This release exports the symbol 窶賄efaultpaper窶�, which was previously
missing.

Release v2.2.4

This release adds missing license files (GPL 3 and MIT) to the
source tarball.

Release v2.2.3

This release fixes the build when configured without --enable-relocatable

Release v2.2.2

This release fixes the license headers of paper.c and paper.h

Release v2.2.1

This release merely puts the correct copyright holders in the copy
of the MIT License.

Release v2.2.0

This release adds the option of using the library under the MIT
license when it is built without relocation support (--enable-relocatable).
It achieves this by replacing all the other LGPL窶册d code from gnulib
with alternative code.

(wiz)