[lz4] Fix for building Linux shared libraries

[here-mikelley]

Describe the pull request

• What does your PR fix?

Fixes issue #7223. This pull request allows lz4 to be compiled as a shared object under Linux.

• Which triplets are supported/not supported? Have you updated the CI baseline?

Supports all current triplets

• Does your PR follow the maintainer guide?

Yes

[Cheney-W]

@here-mikelley
Thanks for your PR!

1. Could you please update the version in ports/lz4/CONTROL as 1.9.2-1?
2. include(vcpkg_common_functions) is no longer needed, could you please remove this line?
3. Could you please modify the line 37 and 38 of ports/lz4/portfile.cmake as below:
   file(INSTALL ${SOURCE_PATH}/lib/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)

You can get more information from maintainer-guide.md.

[here-mikelley]

Thanks @Cheney-W . I've added a commit that should have all of your requested changes.

[Cheney-W]

/azp run

[PhoebeHui]

/azp run

[dan-shaw]

@here-mikelley I'm not sure what this PR fixes. Can you open an issue/provide an example on what it does?

[here-mikelley]

@here-mikelley I'm not sure what this PR fixes. Can you open an issue/provide an example on what it does?

I've updated my original pull-request description by referencing a previously submitted issue. This pull request allows users to build lz4 as a dynamic library under Linux.

[ras0219-msft]

LGTM, thanks for the PR!