Manual: switch to inputenx and load additional characters.

Since we're now loading a file from inputenx directly change to inputenx in
general to avoid issues between those two packages. Fixes manual builds that
broke because of U+0101 and U+0146 glyphs which aren't defined in the utf8
inputenc package.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29428 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/preamble.tex b/manual/preamble.tex
index 5394c63..8ff9c08 100644
--- a/manual/preamble.tex
+++ b/manual/preamble.tex
@@ -20,8 +20,10 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[a4paper,11pt]{scrreprt}
-\usepackage[utf8]{inputenc}
+\usepackage[utf8]{inputenx}
 \usepackage[T1]{fontenc}
+% load ix-utf8enc.dfu to get additional characters from the inputenx package.
+\makeatletter\input{ix-utf8enc.dfu}\makeatother
 % This manual used to use Palatino as font. This caused issues with small caps
 % (textsc), so do not use that font as default one anymore.