Memcpy for pointers involving structs was fixed via field sensitivity

This test passes as of ca9fcb7, except for the missing "line NN" part
that wasn't included in the pattern to be matched.

Fixes: diffblue#2925

Author: tautschnig

regression/cbmc-library/memcpy-01/test.desc

@@ -1,11 +1,11 @@
-KNOWNBUG
+CORE
 main.c
 --bounds-check --pointer-check
 ^EXIT=0$
 ^SIGNAL=0$
 ^VERIFICATION SUCCESSFUL$
-^\[main\.assertion\.5\] assertion q\.s->x == 42: SUCCESS$
-^\[main\.assertion\.6\] assertion q\.s->y == 43: SUCCESS$
+^\[main\.assertion\.5\] line 46 assertion q\.s->x == 42: SUCCESS$
+^\[main\.assertion\.6\] line 47 assertion q\.s->y == 43: SUCCESS$
 --
 ^warning: ignoring
 --