* gnu/packages/doxygen.scm (doxygen)[source]: Update to 1.8.11.
Drop one patch.
[build-system]: Switch to cmake-build-system, since gnu-build-system
is not supported any more.
[arguments]: Adapt.
[native-inputs]: Drop unused perl.
* gnu/packages/patches/doxygen-tmake.patch: Remove file.
* gnu/packages/patches/doxygen-test.patch: Adapt.
* gnu-system.am (dist_patch_DATA): Unregister patch.
* gnu/packages/doxygen.scm: New file.
* gnu/packages/patches/doxygen-test.patch,
gnu/packages/patches/doxygen-tmake.patch: New files.
* gnu-system.am (GNU_SYSTEM_MODULES, dist_patch_DATA): Register the new files.
Andreas Enge