[geos] build failure dynamic linkage

[ASxa86]

Host Environment

• OS: Ubuntu 20.04
• Compiler: gcc v9.3.0

To Reproduce
Steps to reproduce the behavior:
./vcpkg install geos:x64-linux-shared

Failure logs
There should be no empty directories in /home/aaron/dev/vcpkg/packages/geos_x64-linux-shared
The following empty directories were found:

/home/aaron/dev/vcpkg/packages/geos_x64-linux-shared/bin
/home/aaron/dev/vcpkg/packages/geos_x64-linux-shared/debug/bin

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")

Found 1 error(s). Please correct the portfile:
/home/aaron/dev/vcpkg/ports/geos/portfile.cmake
-- Performing post-build validation done
Error: Building package geos:x64-linux-shared failed with: POST_BUILD_CHECKS_FAILED
Please ensure you're using the latest portfiles with .\vcpkg update, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: geos:x64-linux-shared
Vcpkg version: 2020.02.04-unknownhash

Additionally, attach any relevant sections from the log files above.

Additional context
Fix by removing the linkage check in to portfile.cmake prior to removing the bin directories.

[JackBoosY]

Solved by #17616.