Update XZ Utils to 5.0.3 (in deps)

tests/test_files.sh

-#/bin/sh
+#!/bin/sh
 
 ###############################################################################
 #
 # Author: Lasse Collin
 #
 # This file has been put into the public domain.
 # You can do whatever you want with this file.
 #
 ###############################################################################
 
+# If both xz and xzdec were not build, skip this test.
+XZ=../src/xz/xz
+XZDEC=../src/xzdec/xzdec
+test -x "$XZ" || XZ=
+test -x "$XZDEC" || XZDEC=
+if test -z "$XZ$XZDEC"; then
+        (exit 77)
+        exit 77
+fi
+
 for I in "$srcdir"/files/good-*.xz
 do
-        if ../src/xzdec/xzdec "$I" > /dev/null 2> /dev/null ; then
+        if test -z "$XZ" || "$XZ" -dc "$I" > /dev/null 2>&1; then
+                :
+        else
+                echo "Good file failed: $I"
+                (exit 1)
+                exit 1
+        fi
+
+        if test -z "$XZDEC" || "$XZDEC" "$I" > /dev/null 2>&1; then
                 :
         else
                 echo "Good file failed: $I"
                 (exit 1)
                 exit 1
         fi
 done
 
 for I in "$srcdir"/files/bad-*.xz
 do
-        if ../src/xzdec/xzdec "$I" > /dev/null 2> /dev/null ; then
+        if test -n "$XZ" && "$XZ" -dc "$I" > /dev/null 2>&1; then
+                echo "Bad file succeeded: $I"
+                (exit 1)
+                exit 1
+        fi
+
+        if test -n "$XZDEC" && "$XZDEC" "$I" > /dev/null 2>&1; then
                 echo "Bad file succeeded: $I"
                 (exit 1)
                 exit 1
         fi
 done
 
 (exit 0)
 exit 0