[PATCH 1/8] Move glibc.malloc.check implementation into its own file

[DJ Delorie]

Siddhesh Poyarekar <siddhesh@sourceware.org> writes:
> Separate the malloc check implementation from the malloc hooks.  They
> still use the hooks but are now maintained in a separate file.

Missing Makefile dependency.  Otherwise, it's just a block code move,
which is fine.