Update XZ Utils to 5.0.3 (in deps)

windows/INSTALL-Windows.txt

 
 Building XZ Utils on Windows
 ============================
 
 Introduction
 ------------
 
     This document explains shortly where to get and how to install the
     build tool that are needed to build XZ Utils on Windows. The final
     binary package will be standalone in sense that it will depend only
@@ skipping 100 matching lines @@
     Start MSYS by going to the directory C:\devel\tools\msys and running
     msys.bat there (double-click or use command prompt). It will start
     at "home" directory, which is C:\devel\tools\msys\home\YourUserName.
 
     If you have xz-5.x.x.tar.gz in C:\devel, you should be able to build
     it now with the following commands:
 
         cd /c/devel
         tar xzf xz-5.x.x.tar.gz
         cd xz-5.x.x
-        sh windows/build.sh
+        bash windows/build.bash
 
     If you used some other directory than C:\devel\tools for the build
-    tools, edit the variables near the beginning of build.sh first.
+    tools, edit the variables near the beginning of build.bash first.
 
     If you want to build manually, read the buildit() function in
-    build.sh. Look especially at the latter configure invocation.
+    build.bash. Look especially at the latter configure invocation.
 
     Be patient. Running configure and other scripts used by the build
     system is (very) slow under Windows.
 
+
+Using a snapshot from the Git repository
+
+    To use a snapshot, the build system files need to be generated with
+    autogen.sh or "autoreconf -fi" before trying to build using the
+    above build instructions. You can install the relevant extra packages
+    from MinGW or use Cygwin or use e.g. a GNU/Linux system to create a
+    source package with the required build system files.
+