Fix copying of cached map data.

When I added the new ability to read from memory, I didn't fix one
of the pointers in the map data when doing a copy.

Bug: 24352206

(cherry picked from commit 2d1a6f7913ba690595d40e487e9978e695db71d5)

Change-Id: I1671b9c06e67b3f92ff9026e453e44e872466113
diff --git a/src/Los-common.c b/src/Los-common.c
index 111caba..fd6ae3f 100644
--- a/src/Los-common.c
+++ b/src/Los-common.c
@@ -66,6 +66,9 @@
               /* No need to do any lock, the entire local_map_list is locked
                  at this point. */
               new_list->ei = old_list->ei;
+              /* Adjust the map pointer in the elf image data if necessary. */
+              if (!new_list->ei.mapped)
+                new_list->ei.u.memory.map = new_list;
               /* If it was mapped before, make sure to mark it unmapped now. */
               old_list->ei.mapped = false;
               /* Don't bother breaking out of the loop, the next while check