[gtkmm] Use glibmm-2.52 instead of glibmm-2.4

[Murray Cumming <murrayc src gnome org>]

commit 71c0a02d981b4908e114e207dee074d85e3cd76c
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Nov 11 12:35:51 2016 +0100

    Use glibmm-2.52 instead of glibmm-2.4

 configure.ac |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f5b03c8..63e0385 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,7 +95,7 @@ AS_IF([test "x$enable_static" = xyes],
 # gdkmm really does need GTK+, because part of Gdk::DragContext is in GTK+.
 # The extra cairomm-1.0 check is because gdkmm requires a newer cairomm than pangomm requires.
 # The extra gdk-pixbuf-2.0 check is because gdkmm requires a newer gdk-pixbuf than gtk+-4.0 requires.
-AC_SUBST([GDKMM_MODULES], ['giomm-2.4 >= 2.49.1 pangomm-1.4 >= 2.38.2 gtk+-4.0 >= 3.89.0 cairomm-1.0 >= 
1.12.0 gdk-pixbuf-2.0 >= 2.35.5'])
+AC_SUBST([GDKMM_MODULES], ['giomm-2.52 >= 2.49.1 pangomm-1.4 >= 2.38.2 gtk+-4.0 >= 3.89.0 cairomm-1.0 >= 
1.12.0 gdk-pixbuf-2.0 >= 2.35.5'])
 
 AS_IF([test "x$gtkmm_host_windows" = xyes],
       [GTKMM_MODULES=$GDKMM_MODULES],
@@ -117,7 +117,7 @@ PKG_CHECK_MODULES([GTKMM_DEMOS_EXTRA], [$GTKMM_DEMOS_EXTRA_MODULES])
 
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])
 MM_PKG_CONFIG_SUBST([GTHREAD_LIBS], [--libs gthread-2.0])
-MM_PKG_CONFIG_SUBST([GMMPROC_DIR], [--variable=gmmprocdir glibmm-2.4])
+MM_PKG_CONFIG_SUBST([GMMPROC_DIR], [--variable=gmmprocdir glibmm-2.52])
 MM_PKG_CONFIG_SUBST([GMMPROC_EXTRA_M4_DIR], [--variable=gmmprocm4dir pangomm-1.4 atkmm-1.6])
 
 MM_ARG_DISABLE_DEPRECATED_API([GDKMM GTKMM])
@@ -125,7 +125,7 @@ MM_ARG_DISABLE_DEPRECATED_API([GDKMM GTKMM])
 MM_ARG_ENABLE_DOCUMENTATION
 MM_ARG_WITH_TAGFILE_DOC([libstdc++.tag], [mm-common-libstdc++])
 MM_ARG_WITH_TAGFILE_DOC([libsigc++-2.0.tag], [sigc++-2.0])
-MM_ARG_WITH_TAGFILE_DOC([glibmm-2.4.tag], [glibmm-2.4])
+MM_ARG_WITH_TAGFILE_DOC([glibmm-2.52.tag], [glibmm-2.52])
 MM_ARG_WITH_TAGFILE_DOC([cairomm-1.0.tag], [cairomm-1.0])
 MM_ARG_WITH_TAGFILE_DOC([pangomm-1.4.tag], [pangomm-1.4])
 MM_ARG_WITH_TAGFILE_DOC([atkmm-1.6.tag], [atkmm-1.6])