tile: Enable PI_STATIC_AND_HIDDEN

This does make ld.so very slightly larger (0.3%) and doesn't seem to
actually improve performance; in fact, my limited testing suggested a
slight (0.1%) performance decrease (running fork/exec of a no-op program
in a loop), but I didn't do enough testing to establish statistical
significance.

However, Roland agrees that it makes sense to switch tile to using
this path, since it's the more standard way.

ChangeLog

@@ -1,3 +1,8 @@
+2015-04-16  Chris Metcalf  <cmetcalf@ezchip.com>
+
+	* sysdeps/tile/configure.ac: New file.
+	* sysdeps/tile/configure: Regenerated.
+
 2015-04-15  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
 	* wcsmbs/wcschr.c [WCSCHR] (wcschr): Define as __wcschr.  Remove

sysdeps/tile/configure

@@ -0,0 +1,7 @@
+# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
+ # Local configure fragment for sysdeps/tile.
+
+# We can always access static and hidden symbols in a position independent way.
+$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
+
+# work around problem with autoconf and empty lines at the end of files

sysdeps/tile/configure.ac

@@ -0,0 +1,6 @@
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/tile.
+
+# We can always access static and hidden symbols in a position independent way.
+AC_DEFINE(PI_STATIC_AND_HIDDEN)
+# work around problem with autoconf and empty lines at the end of files