chore: import upstream snapshot with attribution

modules/core/misc/plugins/parallel_openmp/CMakeLists.txt

@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.5)
+project(opencv_core_parallel_openmp CXX)
+
+get_filename_component(OpenCV_SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/../../../../.." ABSOLUTE)
+include("${OpenCV_SOURCE_DIR}/cmake/OpenCVPluginStandalone.cmake")
+
+# scan dependencies
+set(WITH_OPENMP ON)
+include("${OpenCV_SOURCE_DIR}/modules/core/cmake/parallel/init.cmake")
+
+message(STATUS "OpenMP: ${OpenMP_CXX_VERSION}")
+ocv_create_plugin(core "opencv_core_parallel_openmp" "ocv.3rdparty.openmp" "OPENMP" "src/parallel/parallel_openmp.cpp")

modules/core/misc/plugins/parallel_tbb/CMakeLists.txt

@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.5)
+project(opencv_core_parallel_tbb CXX)
+
+get_filename_component(OpenCV_SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/../../../../.." ABSOLUTE)
+include("${OpenCV_SOURCE_DIR}/cmake/OpenCVPluginStandalone.cmake")
+
+# scan dependencies
+set(WITH_TBB ON)
+include("${OpenCV_SOURCE_DIR}/modules/core/cmake/parallel/init.cmake")
+
+message(STATUS "TBB: ver ${TBB_VERSION_MAJOR}.${TBB_VERSION_MINOR} interface ${TBB_INTERFACE_VERSION}")
+ocv_create_plugin(core "opencv_core_parallel_tbb" "ocv.3rdparty.tbb" "TBB" "src/parallel/parallel_tbb.cpp")