lazy-pages: do not treat VMAs that have MAP_LOCKED as lazy

When a VMA is mapped with MAP_LOCKED it is address space is populated with
pages which causes UFFDIO_COPY to return -EXISTS. Until we can find some
better solution let's avoid marking VMAs with MAP_LOCKED as lazy.

Fixes: #238

travis-ci: success for lazy-pages: misc fixes (rev3)
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/vma.h

@@ -129,6 +129,7 @@ static inline bool vma_entry_can_be_lazy(VmaEntry *e)
 {
 	return ((e->flags & MAP_ANONYMOUS) &&
 		(e->flags & MAP_PRIVATE) &&
+		!(e->flags & MAP_LOCKED) &&
 		!(vma_entry_is(e, VMA_AREA_VDSO)) &&
 		!(vma_entry_is(e, VMA_AREA_VSYSCALL)));
 }