app-i18n/xvnkb: run configure with bash

config.h:1:1: error: expected identifier or ‘(’ before ‘-’ token
    1 | -e #ifndef __VK_CONFIG_H

This is just... dandy... I too love unix command flags echo'ed into my
headers...

It uses echo -e to a header, which breaks on non-bash shells and is
generally a problem.

Closes: https://bugs.gentoo.org/886069
Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>
Signed-off-by: Sam James <sam@gentoo.org>

app-i18n/xvnkb/xvnkb-0.2.11.ebuild

@@ -31,8 +31,8 @@ src_prepare() {
 }
 
 src_configure() {
-	# *not* autotools
-	./configure \
+	# *not* autotools. Uses broken logic that assumes all the world is a bash
+	bash ./configure \
 		$(usex spell '' '--no-spellcheck') \
 		$(usex xft '' '--no-xft') \
 		--use-extstroke \