[ekiga] Updated ax_boost_base.m4 to latest version

[Julien Puydt <jpuydt src gnome org>]

commit 685e41be81a8a901ccbfe6ff448237e60d4f0c77
Author: Julien Puydt <jpuydt free fr>
Date:   Sat Sep 14 15:29:49 2013 +0200

    Updated ax_boost_base.m4 to latest version

 m4/ax_boost_base.m4 |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/m4/ax_boost_base.m4 b/m4/ax_boost_base.m4
index 54a2a1b..57d14fe 100644
--- a/m4/ax_boost_base.m4
+++ b/m4/ax_boost_base.m4
@@ -33,7 +33,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 20
+#serial 21
 
 AC_DEFUN([AX_BOOST_BASE],
 [
@@ -91,9 +91,11 @@ if test "x$want_boost" = "xyes"; then
     dnl are found, e.g. when only header-only libraries are installed!
     libsubdirs="lib"
     ax_arch=`uname -m`
-    if test $ax_arch = x86_64 -o $ax_arch = ppc64 -o $ax_arch = s390x -o $ax_arch = sparc64; then
+    case $ax_arch in
+      x86_64|ppc64|s390x|sparc64|aarch64)
         libsubdirs="lib64 lib lib64"
-    fi
+        ;;
+    esac
 
     dnl first we check the system location for boost libraries
     dnl this location ist chosen if boost libraries are installed with the --layout=system option