configure.ac: generate lxc-* as executable

This allows them to be executed directly, and symlinked from
/usr/share/lxc/templates/ to the build directory for easier testing with
a system-installed lxc.

Signed-off-by: Antonio Terceiro <terceiro@debian.org>

configure.ac

@@ -214,7 +214,9 @@ AC_CONFIG_FILES([
 	templates/lxc-sparclinux
 	templates/lxc-voidlinux
 	templates/lxc-sabayon
-])
+	],
+	if test "${ac_file##templates/lxc-}" != "${ac_file}"; then chmod +x $ac_file; fi
+)
 AC_CONFIG_COMMANDS([default],[[]],[[]])
 AC_OUTPUT