[m4-common] Add AX_CXX_COMPILE_STDCXX_11 macro

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 241af2abf2151f1bcb3cf16371deeaf9ed11edf1
Author: Kalev Lember <klember redhat com>
Date:   Mon Nov 30 23:04:26 2015 +0100

    Add AX_CXX_COMPILE_STDCXX_11 macro
    
    It's needed for building PackageKit in gnome-continuous.

 Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index b251ffb..9e4129d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,6 +12,7 @@ dist_aclocal_DATA = \
        autoconf-archive/m4/ax_compiler_flags_cxxflags.m4               \
        autoconf-archive/m4/ax_compiler_flags_ldflags.m4                \
        autoconf-archive/m4/ax_compiler_flags_gir.m4                    \
+       autoconf-archive/m4/ax_cxx_compile_stdcxx_11.m4                 \
        autoconf-archive/m4/ax_pkg_check_modules.m4                     \
        autoconf-archive/m4/ax_require_defined.m4                       \
        $(NULL)