openfstwin: suppress dlls without exports error

warning: DLLs without any exports are likely a bug in the build script. If this is intended, add the following line in the portfile:
set(VCPKG_POLICY_DLLS_WITHOUT_EXPORTS enabled)
The following DLLs have no exports:

  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\arc_lookahead-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact16_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact16_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact16_unweighted-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact16_unweighted_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact16_weighted_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact64_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact64_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact64_unweighted-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact64_unweighted_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact64_weighted_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact8_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact8_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact8_unweighted-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact8_unweighted_acceptor-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\compact8_weighted_string-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\const16-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\const64-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\const8-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\fstcompact.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\fstconst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\fstlookahead.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\ilabel_lookahead-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\linear-classifier-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\linear-tagger-fst.dll
  C:\code\ThirdParty-Packages-vcpkg\vcpkg\packages\openfstwin_x64-windows-dynamic-release\bin\olabel_lookahead-fst.dll

custom-ports/openfstwin/portfile.cmake

@@ -21,6 +21,7 @@ vcpkg_configure_cmake(
     PREFER_NINJA
 )
 
+set(VCPKG_POLICY_DLLS_WITHOUT_EXPORTS enabled)
 vcpkg_install_cmake()
 vcpkg_copy_pdbs()
 vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/COPYING")