[tinyutf8] Initial port for tinyutf8. (#4388)

* Add tinyutf8 port.

* [tinyutf8] Use vcpkg_from_github(). Simplify patch.

ports/tinyutf8/CONTROL

@@ -0,0 +1,3 @@
+Source: tinyutf8
+Version: 2.1.1-1
+Description: TINYUTF8 is a library for extremely easy integration of Unicode into an arbitrary C++11 project.

ports/tinyutf8/fixbuild.patch

@@ -0,0 +1,29 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4ec8787..cfea5b3 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,7 +1,7 @@
+ cmake_minimum_required(VERSION 3.1)
+ project(tinyutf8)
+ 
+-set(CMAKE_CXX_STANDARD 11)
++set(CMAKE_CXX_STANDARD 17)
+ 
+ option(TINYUTF8_BUILD_STATIC "Build as static library" On)
+ 
+@@ -14,3 +14,14 @@ endif()
+ add_library(tinyutf8 ${LIB_BUILD_TYPE} lib/tinyutf8.cpp)
+ 
+ target_include_directories(tinyutf8 PUBLIC include)
++
++if(MSVC)
++    ADD_DEFINITIONS(-D_UNICODE)
++endif()
++
++install(TARGETS tinyutf8
++    RUNTIME DESTINATION bin
++    ARCHIVE DESTINATION lib
++    LIBRARY DESTINATION lib)
++
++install(FILES include/tinyutf8.h DESTINATION include)
+\ No newline at end of file

ports/tinyutf8/portfile.cmake

@@ -0,0 +1,29 @@
+include(vcpkg_common_functions)
+
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO DuffsDevice/tinyutf8
+    REF v2.1.1
+    SHA512 0be9cebe1ac962c89e0620586d4f8d4f3059b52394e13506f19723855d146c35e6a1205ae5430a53ba95a89c60216054bfad9c4e8e8f1ec047f4096585de2efc
+    HEAD_REF master
+    PATCHES fixbuild.patch
+)
+
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" TINYUTF8_BUILD_STATIC)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS -DTINYUTF8_BUILD_STATIC=${TINYUTF8_BUILD_STATIC}
+)
+
+vcpkg_install_cmake()
+vcpkg_copy_pdbs()
+
+# Handle copyright
+configure_file(${SOURCE_PATH}/LICENCE ${CURRENT_PACKAGES_DIR}/share/tinyutf8/copyright COPYONLY)
+
+# remove unneeded files
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)