[openimageio] find_package support (microsoft#7588)

* Copy find module to share; Append share to module path

* Bump version

ports/openimageio/CONTROL

@@ -1,5 +1,5 @@
 Source: openimageio
-Version: 2019-08-08
+Version: 2019-08-08-1
 Homepage: https://github.com/OpenImageIO/oiio
 Description: A library for reading and writing images, and a bunch of related classes, utilities, and application
 Build-Depends: libjpeg-turbo, tiff, libpng, openexr, boost-thread, boost-smart-ptr, boost-foreach, boost-regex, boost-type-traits, boost-static-assert, boost-unordered, boost-config, boost-algorithm, boost-filesystem, boost-system, boost-thread, boost-asio, boost-random, robin-map, boost-stacktrace

ports/openimageio/portfile.cmake

@@ -71,6 +71,9 @@ file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/doc)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
 
+file(COPY ${SOURCE_PATH}/src/cmake/modules/FindOpenImageIO.cmake DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})
+
 # Handle copyright
 file(COPY ${SOURCE_PATH}/LICENSE.md DESTINATION ${CURRENT_PACKAGES_DIR}/share/openimageio)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/openimageio/LICENSE.md ${CURRENT_PACKAGES_DIR}/share/openimageio/copyright)

ports/openimageio/vcpkg-cmake-wrapper.cmake

@@ -0,0 +1,8 @@
+set(OPENIMAGEIO_PREV_MODULE_PATH ${CMAKE_MODULE_PATH})
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
+
+if(NOT OPENIMAGEIO_LIBRARIES)
+  _find_package(${ARGS})
+endif()
+
+set(CMAKE_MODULE_PATH ${OPENIMAGEIO_PREV_MODULE_PATH})