Pull upstream hwloc commit 5198d4c0fd6cae12756fb44aed16a2d4a58b1a25

Change the logic in bind.c to only include <malloc.h> if we don't have posix_memalign.
    
In http://www.open-mpi.org/community/lists/devel/2014/01/13619.php,
Paul Hargrove found a compiler warning on OpenBSD where <malloc.h>
exists, but is not intended to be used (and doesn't error out, so
AC_CHECK_HEADERS says its ok).

Reviewed by Brice Goglin.

cmr=v1.7.4:reviewer=ompi-rm1.7

This commit was SVN r30234.

opal/mca/hwloc/hwloc172/README-ompi.txt

@@ -1,3 +1,4 @@
 Applied the following patches from the upstream hwloc 1.7 branch after
 the v1.7.2 release:
 
+5198d4c Only include <malloc.h> if necessary

opal/mca/hwloc/hwloc172/hwloc/src/bind.c

@@ -13,7 +13,8 @@
 #ifdef HAVE_SYS_MMAN_H
 #  include <sys/mman.h>
 #endif
-#ifdef HAVE_MALLOC_H
+/* <malloc.h> is only needed if we don't have posix_memalign() */
+#if defined(hwloc_getpagesize) && !defined(HAVE_POSIX_MEMALIGN) && defined(HAVE_MEMALIGN) && defined(HAVE_MALLOC_H)
 #include <malloc.h>
 #endif
 #ifdef HAVE_UNISTD_H