ci/wine: Make build-wine safe for set -u

Signed-off-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31281>

.gitlab-ci/container/install-wine-apitrace.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -ue
+
 APITRACE_VERSION="11.1"
 APITRACE_VERSION_DATE=""
 

.gitlab-ci/container/install-wine-dxvk.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -e
+set -ue
 
 overrideDll() {
   if ! wine reg add 'HKEY_CURRENT_USER\Software\Wine\DllOverrides' /v "$1" /d native /f; then

.gitlab-ci/container/setup-wine.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set -u
+
 export WINEPREFIX="$1"
 export WINEDEBUG="-all"