Bug 1311346 - Add cubeb_export.h to the tree.

--HG--
extra : histedit_source : 7d538af3b6990e25fa4e4c6257589d5977fa3d95

media/libcubeb/include/cubeb_export.h

@@ -0,0 +1,5 @@
+/**
+ * This defines CUBEB_EXPORT to an empty string, we don't need any annotation to
+ * build in Gecko.
+ */
+#define CUBEB_EXPORT