message: [icu] mingw support + [mp3lame] Fix VCPKG_TARGET_STATIC_LIBRARY_SUFFIX
diff: @@ -23,6 +23,7 @@ namespace vcpkg::PlatformExpression
  wasm32,
  windows,
  + mingw,
  linux,
  osx,
  uwp,
  @@ -41,6 +42,7 @@ namespace vcpkg::PlatformExpression
  {"arm64", Identifier::arm64},
  {"wasm32", Identifier::wasm32},
  {"windows", Identifier::windows},
  + {"mingw", Identifier::mingw},
  {"linux", Identifier::linux},
  {"osx", Identifier::osx},
  {"uwp", Identifier::uwp},
  @@ -382,6 +384,7 @@ namespace vcpkg::PlatformExpression
  case Identifier::windows:
  return true_if_exists_and_equal("VCPKG_CMAKE_SYSTEM_NAME", "") ||
  true_if_exists_and_equal("VCPKG_CMAKE_SYSTEM_NAME", "WindowsStore");
  + case Identifier::mingw: return true_if_exists_and_equal("VCPKG_CMAKE_SYSTEM_NAME", "MinGW");
  case Identifier::linux: return true_if_exists_and_equal("VCPKG_CMAKE_SYSTEM_NAME", "Linux");
  case Identifier::osx: return true_if_exists_and_equal("VCPKG_CMAKE_SYSTEM_NAME", "Darwin");
  case Identifier::uwp:
  