[gtk+] build: Fix MKDIR_P for recent automake

[Marc-Antoine Perennou <marcop src gnome org>]

commit 4aab1ea6e9f992bcc54e5b22b77760f7cf862f9a
Author: Marc-Antoine Perennou <Marc-Antoine Perennou com>
Date:   Thu Jun 7 16:35:12 2012 +0200

    build: Fix MKDIR_P for recent automake
    
    Signed-off-by: Marc-Antoine Perennou <Marc-Antoine Perennou com>

 configure.ac    |    1 +
 gtk/Makefile.am |    6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a6c4607..d3215dc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -125,6 +125,7 @@ AC_SUBST([GAIL_LT_CURRENT_MINUS_AGE],[gail_lt_current_minus_age])
 AC_PROG_CC
 AC_PROG_CC_C_O
 AC_PROG_CC_STDC
+AC_PROG_MKDIR_P
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index dfa90ac..659bad9 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -1151,7 +1151,7 @@ endif
 
 if USE_QUARTZ
 install-mac-key-theme:
-	$(mkdir_p) $(DESTDIR)$(datadir)/themes/Mac/gtk-3.0
+	$(MKDIR_P) $(DESTDIR)$(datadir)/themes/Mac/gtk-3.0
 	$(INSTALL_DATA) $(srcdir)/gtk-keys.css.mac $(DESTDIR)$(datadir)/themes/Mac/gtk-3.0/gtk-keys.css
 uninstall-mac-key-theme:
 	rm -f $(DESTDIR)$(datadir)/themes/Mac/gtk-3.0/gtk-keys.css
@@ -1194,9 +1194,9 @@ dist-hook: ../build/win32/vs9/gtk.vcproj ../build/win32/vs10/gtk.vcxproj ../buil
 
 # Install a RC file for the default GTK+ theme, and key themes
 install-data-local: install-ms-lib install-def-file install-mac-key-theme
-	$(mkdir_p) $(DESTDIR)$(datadir)/themes/Default/gtk-3.0
+	$(MKDIR_P) $(DESTDIR)$(datadir)/themes/Default/gtk-3.0
 	$(INSTALL_DATA) $(srcdir)/gtk-keys.css.default $(DESTDIR)$(datadir)/themes/Default/gtk-3.0/gtk-keys.css
-	$(mkdir_p) $(DESTDIR)$(datadir)/themes/Emacs/gtk-3.0
+	$(MKDIR_P) $(DESTDIR)$(datadir)/themes/Emacs/gtk-3.0
 	$(INSTALL_DATA) $(srcdir)/gtk-keys.css.emacs $(DESTDIR)$(datadir)/themes/Emacs/gtk-3.0/gtk-keys.css
 
 uninstall-local: uninstall-ms-lib uninstall-def-file uninstall-mac-key-theme