release: prepare for 3.3.90.1

NEWS

+3.3.90.1
+========
+
+Theme GtkColorChooser backdrop state
+Fix borders for primary toolbar combobox entries on primary toolbars
+Fix background not properly clipped on GtkSwitch and troughs
+Fix background color of selected rows for Documents
+Fix Terminal colors in HighContrast/HighContrastInverse
+Fix text shadow for raised active buttons
+
 3.3.90
 ======
 

configure.ac

 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.53)
 
-AC_INIT([gnome-themes-standard], [3.3.90],
+AC_INIT([gnome-themes-standard], [3.3.90.1],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-themes-standard])
 
 AM_INIT_AUTOMAKE([1.9 tar-ustar foreign dist-xz no-dist-gzip])