Enable ASIO for PortAudio

Add patch to make asio devices lazily initialized to prevent audio drops on startup

Author: kryksyh

recipes/portaudio/build.cmake

@@ -0,0 +1,18 @@
+get_property(_asiosdk_src GLOBAL PROPERTY asiosdk_SOURCE_DIR)
+if(BD_OS STREQUAL "windows" AND _asiosdk_src)
+    file(GLOB_RECURSE _asio_hdrs "${_asiosdk_src}/*.h")
+    foreach(_h ${_asio_hdrs})
+        if(_h MATCHES "/common/asio\\.h$")
+            get_filename_component(_asio_common "${_h}" DIRECTORY)
+            get_filename_component(_asiosdk_root "${_asio_common}" DIRECTORY)
+            break()
+        endif()
+    endforeach()
+    if(NOT _asiosdk_root)
+        message(FATAL_ERROR "[${BD_NAME}] asiosdk source at ${_asiosdk_src} has no common/asio.h")
+    endif()
+    message(STATUS "[${BD_NAME}] ASIO enabled, SDK root: ${_asiosdk_root}")
+    list(APPEND DEP_CMAKE_ARGS -DPA_USE_ASIO=ON "-DASIOSDK_ROOT_DIR=${_asiosdk_root}")
+endif()
+
+_bd_cmake_build("${SRC}")