Update the tcmalloc vendor branch to r144 (gperftools 2.0).

third_party/tcmalloc/vendor/aclocal.m4

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 # run `make install-strip'.  However `strip' might not be the right
 # tool to use in cross-compilation environments, therefore Automake
 # will honor the `STRIP' environment variable to overrule this program.
 dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
 if test "$cross_compiling" != no; then
   AC_CHECK_TOOL([STRIP], [strip], :)
 fi
-INSTALL_STRIP_PROGRAM="\${SHELL} \$(install_sh) -c -s"
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 AC_SUBST([INSTALL_STRIP_PROGRAM])])
 
+# Copyright (C) 2006  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
+# This macro is traced by Automake.
+AC_DEFUN([_AM_SUBST_NOTMAKE])
+
 # Check how to create a tarball.                            -*- Autoconf -*-
 
 # Copyright (C) 2004, 2005  Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
 # serial 2
 
@@ skipping 90 matching lines @@
 m4_include([m4/install_prefix.m4])
 m4_include([m4/libtool.m4])
 m4_include([m4/ltoptions.m4])
 m4_include([m4/ltsugar.m4])
 m4_include([m4/ltversion.m4])
 m4_include([m4/lt~obsolete.m4])
 m4_include([m4/namespaces.m4])
 m4_include([m4/pc_from_ucontext.m4])
 m4_include([m4/program_invocation_name.m4])
 m4_include([m4/stl_namespace.m4])