[gstreamermm] Update required glibmm version

[Marcin Kolny <mkolny src gnome org>]

commit d3f5de1b98b0666cfb10d2a05ff39ec9aa096117
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Tue Sep 27 21:22:50 2016 +0200

    Update required glibmm version

 README       |    8 ++------
 configure.ac |    2 +-
 2 files changed, 3 insertions(+), 7 deletions(-)
---
diff --git a/README b/README
index 8eec5e4..44cb99c 100644
--- a/README
+++ b/README
@@ -20,9 +20,8 @@ are also provided along with many of the base plug-ins.
 Dependencies
 ============
 
-gstreamermm requires glibmm >= 2.36.0 and libxml++ >= 2.14.0 along with the
-libraries that these require.  For the examples, gtkmm >= 3.0 is also
-required.
+gstreamermm requires glibmm >= 2.47.6 along with the libraries that these
+require. For the examples, gtkmm >= 3.0 is also required.
 
 Build Dependencies
 ==================
@@ -34,9 +33,6 @@ you must have the correct libraries installed when building them.
 For instance on debian/Ubuntu, apt-get install:
 libvorbis-dev libtheora-dev libasound-dev libxv-dev libvisual-0.4-dev libcdparanoia-dev
 
-You will also need to use --enable-experimental when building gst-plugins-base,
-to build the giosink plug-in.
-
 Links
 =====
 
diff --git a/configure.ac b/configure.ac
index 82474f9..8564a0b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -64,7 +64,7 @@ AS_IF([test "x$enable_static" = xyes],
 # file.
 
 AC_SUBST([GSTREAMERMM_MODULES],
-         ['giomm-2.4 >= 2.45.41[]m4_foreach([gstmm_mod],
+         ['giomm-2.4 >= 2.47.6[]m4_foreach([gstmm_mod],
          [[], [-base], [-check], [-controller], [-net],
           [-allocators], [-app], [-audio], [-fft], [-pbutils],
           [-plugins-base], [-riff], [-rtp], [-rtsp], [-sdp],