vendor.sh: looser error handling on find_me

i added a stricter check recently, but this broke
extraction on fresh lbmk clones, tested when doing
a release-build test.

loosen it up again, but only for find_me

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/vendor.sh

@@ -160,7 +160,6 @@ extract_intel_me()
 	x_ rm -Rf "$xbmkpwd/metmp"
 
 	( fx_ find_me x_ find "$xbmkpwd/$appdir" -type f ) || :; :
-	set -u -e
 
 	if [ "$ME11bootguard" = "y" ]; then
 		apply_deguard_hack