Use 'sh' instead of 'sh -e'

'sh -e' makes the shell script die if any command returns an error which isn't
caught. While this is a nice feature, this script doesn't actually need this.
Not using this shell feature makes the script more portable.

Thanks to Edward O'Callaghan aka eocallagha for stumbling upon this.

Signed-off-by: Uli Schlachter <psychon@znc.in>

build-utils/gperf.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh
 #
 # Copyright © 2008 Pierre Habouzit <madcoder@debian.org>
 #