[gnome-characters/wip/dueno/emoji] build: Pull necessary unistr modules from Gnulib

[Daiki Ueno <dueno src gnome org>]

commit c56ed59cd721b480a6f74d55e201d86966d881e1
Author: Daiki Ueno <dueno src gnome org>
Date:   Mon Aug 21 16:50:11 2017 +0200

    build: Pull necessary unistr modules from Gnulib

 autogen.sh |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 520e605..9558399 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -40,6 +40,8 @@ test -z "$GNULIB_SRCDIR" || \
                    unictype/scripts-all \
                    uninorm/canonical-decomposition \
                    unistr/u32-to-u8 \
+                   unistr/u8-to-u32 \
+                   unistr/u8-strmblen \
                    unitypes \
                    uniname/uniname \
                    uniwidth/width