[Bug malloc/19473] Turn malloc_get_state etc. in compatibility symbols

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https://sourceware.org/bugzilla/show_bug.cgi?id=19473

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e863cce57bff6cb795e6aad745ddf6235bca21ce

commit e863cce57bff6cb795e6aad745ddf6235bca21ce
Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Oct 26 13:28:28 2016 +0200

    malloc: Remove malloc_get_state, malloc_set_state [BZ #19473]

    After the removal of __malloc_initialize_hook, newly compiled
    Emacs binaries are no longer able to use these interfaces.
    malloc_get_state is only used during the Emacs build process,
    so we provide a stub implementation only.  Existing Emacs binaries
    will not call this stub function, but still reference the symbol.

    The rewritten tst-mallocstate test constructs a dumped heap
    which should approximates what existing Emacs binaries pass
    to glibc malloc.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                |   16 ++
 NEWS                     |    8 +
 malloc/Makefile          |    3 +
 malloc/hooks.c           |   63 ++-----
 malloc/malloc.c          |    2 -
 malloc/malloc.h          |    7 -
 malloc/tst-mallocstate.c |  505 ++++++++++++++++++++++++++++++++++++++++++----
 7 files changed, 504 insertions(+), 100 deletions(-)

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