[evolution] Use automake subdir-objects option

[Milan Crha <mcrha src gnome org>]

commit 351ae5c5216610a6b91d8ffb359c6e573e2c631f
Author: Milan Crha <mcrha redhat com>
Date:   Fri Feb 6 08:07:45 2015 +0100

    Use automake subdir-objects option
    
    As suggested by automake, due to source files being referenced
    in sub-directories.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index de08b8d..b12e368 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,7 +19,7 @@ m4_define([base_version], [3.14])
 dnl Autoconf / Automake Initialization
 AC_PREREQ([2.64])
 
AC_INIT([evolution],[evo_version],[http://bugzilla.gnome.org/enter_bug.cgi?product=Evolution],[evolution],[http://wiki.gnome.org/Apps/Evolution/])
-AM_INIT_AUTOMAKE([1.10 dist-xz no-dist-gzip -Wall -Wno-portability foreign tar-ustar])
+AM_INIT_AUTOMAKE([1.10 dist-xz no-dist-gzip subdir-objects -Wall -Wno-portability foreign tar-ustar])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS(config.h)
 AC_CONFIG_SRCDIR(README)