wic: add mcopy property

Added property that points to the mcopy executable.

(From OE-Core rev: 05badb6427442388b9bea04c8b184a2ce92362ec)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/engine.py

@@ -237,6 +237,7 @@ class Disk:
         self.native_sysroot = native_sysroot
         self._partitions = None
         self._mdir = None
+        self._mcopy = None
         self._partimages = {}
 
         # find parted
@@ -280,6 +281,10 @@ class Disk:
     def mdir(self):
         return self._prop('mdir')
 
+    @property
+    def mcopy(self):
+        return self._prop("mcopy")
+
     def _get_part_image(self, pnum):
         if pnum not in self.partitions:
             raise WicError("Partition %s is not in the image")