Added configure test for mallinfo().

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7906 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index 90f729c..2978dfa 100644
--- a/configure.in
+++ b/configure.in
@@ -950,6 +950,7 @@
 AC_TYPE_SIGNAL
 
 AC_CHECK_FUNCS([floor memchr memset mkdir strchr strdup strpbrk strrchr strstr semtimedop])
+AC_CHECK_FUNCS([mallinfo])
 
 
 # Do we have a useable MPI setup on the primary and/or secondary targets?