Support vcpkg --triplet x64-windows-static-md

[DigitalInBlue]

-- Performing post-build validation
Expected Debug,Dynamic crt linkage, but the following libs had invalid crt linkage:

X:/vcpkg/packages/celero_x64-windows-static-md/debug/lib/celerodd.lib: Debug,Static

To inspect the lib files, use:
    dumpbin.exe /directives mylibfile.lib
Expected Release,Dynamic crt linkage, but the following libs had invalid crt linkage:

    X:/vcpkg/packages/celero_x64-windows-static-md/lib/celero.lib: Release,Static

To inspect the lib files, use:
    dumpbin.exe /directives mylibfile.lib
Found 2 error(s). Please correct the portfile:
    X:\vcpkg\ports\celero\portfile.cmake
-- Performing post-build validation done
Error: Building package celero:x64-windows-static-md 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: celero:x64-windows-static-md
  Vcpkg version: 2021-01-13-d67989bce1043b98092ac45996a8230a059a2d7e

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