headers: Add robuffer.idl to generate robuffer.h

Signed-off-by: Alvin Wong <alvin@alvinhc.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-headers/Makefile.am

diff --git a/mingw-w64-headers/Makefile.am b/mingw-w64-headers/Makefile.am
index ee36012..dcdee4c 100644
--- a/mingw-w64-headers/Makefile.am
+++ b/mingw-w64-headers/Makefile.am
@@ -252,6 +252,7 @@
   include/qedit.idl \
   include/qnetwork.idl \
   include/relogger.idl \
+  include/robuffer.idl \
   include/rtworkq.idl \
   include/vmr9.idl \
   include/wincodec.idl \

mingw-w64-headers/include/robuffer.idl

diff --git a/mingw-w64-headers/include/robuffer.idl b/mingw-w64-headers/include/robuffer.idl
new file mode 100644
index 0000000..cc92256
--- /dev/null
+++ b/mingw-w64-headers/include/robuffer.idl
@@ -0,0 +1,28 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#ifdef __WIDL__
+#pragma winrt
+#endif
+
+import "objidl.idl";
+
+cpp_quote("#if NTDDI_VERSION >= NTDDI_WIN8")
+
+namespace Windows.Storage.Streams {
+
+    [
+        uuid(905a0fef-bc53-11df-8c49-001e4fc686da),
+    ]
+    interface IBufferByteAccess : IUnknown
+    {
+        HRESULT Buffer([out, retval] byte **value);
+    }
+
+}
+
+cpp_quote("STDAPI RoGetBufferMarshaler(IMarshal **bufferMarshaler);")
+cpp_quote("#endif")