Add ChakraCore using powershell replace.

ports/chakracore/CONTROL

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+Source: chakracore
+Version: 1.2.0.0
+Description: Core part of the Chakra Javascript engine

ports/chakracore/portfile.cmake

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+include(vcpkg_common_functions)
+find_program(POWERSHELL powershell)
+
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/ChakraCore-1.2.0.0)
+vcpkg_download_distfile(ARCHIVE_FILE
+    URLS "https://github.com/Microsoft/ChakraCore/archive/v1.2.0.0.tar.gz"
+    FILENAME "ChakraCore-1.2.0.0.tar.gz"
+    SHA512 53e487028a30605a4e2589c40b65da060ca4884617fdba8877557e4db75f911be4433d260132cce3526647622bdc742a0aacda1443a16dfed3d3fdd442539528
+)
+vcpkg_extract_source_archive(${ARCHIVE_FILE})
+
+message(STATUS "Patching JavascriptPromise.cpp for PR#1440...")
+vcpkg_execute_required_process(
+	COMMAND ${POWERSHELL} -command (gc lib/runtime/library/JavascriptPromise.cpp -encoding utf7) -replace('«', '^<^<') -replace('»', '^>^>') | Set-Content lib/runtime/library/JavascriptPromise.cpp
+	WORKING_DIRECTORY ${SOURCE_PATH}
+)
+message(STATUS "Patching done.")
+
+vcpkg_build_msbuild(
+    PROJECT_PATH ${SOURCE_PATH}/Build/Chakra.Core.sln
+)
+
+file(INSTALL
+	${SOURCE_PATH}/lib/jsrt/ChakraCore.h
+	${SOURCE_PATH}/lib/jsrt/ChakraCommon.h
+    DESTINATION ${CURRENT_PACKAGES_DIR}/include
+)
+file(INSTALL
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_debug/ChakraCore.dll
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_debug/ChakraCore.pdb
+    DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin
+)
+file(INSTALL
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_debug/Chakracore.lib
+    DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib
+)
+file(INSTALL
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_release/ChakraCore.dll
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_release/ChakraCore.pdb
+    DESTINATION ${CURRENT_PACKAGES_DIR}/bin
+)
+file(INSTALL
+	${SOURCE_PATH}/Build/VcBuild/bin/${TRIPLET_SYSTEM_ARCH}_release/Chakracore.lib
+    DESTINATION ${CURRENT_PACKAGES_DIR}/lib
+)
+file(INSTALL
+	${SOURCE_PATH}/LICENSE.txt
+	DESTINATION ${CURRENT_PACKAGES_DIR}/share/ChakraCore RENAME copyright)