[openmesh] Upgrade to 8.1

[lijgame]

Tested on Window 10 with Visual Studio 2019 x64

Describe the pull request

• What does your PR fix? #
  Upgrade openmesh to 8.1
• Which triplets are supported/not supported? Have you updated the CI baseline?
  All triplets should be supported. CI baseline is not touched.
• Does your PR follow the maintainer guide?
  Yes.

[LilyWangL]

Thanks for your PR! Can you please correct the Version field in the CONTROL file? You can get more information from maintainer-guide.md.

[lijgame]

Thanks for your PR! Can you please correct the Version field in the CONTROL file? You can get more information from maintainer-guide.md.

Thanks for the suggestions.
New changes have been uploaded.

-Jack

[LilyWangL]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[LilyWangL]

Now openmesh build failed on Linux with the following error:

There should be no empty directories in vcpkg/packages/openmesh_x64-linux
The following empty directories were found:

    vcpkg/packages/openmesh_x64-linux/share/OpenMesh

If a directory should be populated but is not, this might indicate an error in the portfile.
If the directories are not needed and their creation cannot be disabled, use something like this in the portfile to remove them:

    file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/a/dir" "${CURRENT_PACKAGES_DIR}/some/other/dir")

[LilyWangL]

Pinging @lijgame for response. Is work still being done for this PR?

[lijgame]

P

Overlooked the notification.
I will give it a try on Linux later tonight.

[lijgame]

Some folders are installed into wrong path because Linux is case sensitive.
Now it should compile on Linux.
@LilyWangL

-Jiang