Set wildcard classpath for windows start batch (#371)

The generated start script for Windows consists of a huge classpath.
This classpath was too long, resulting in an error when executing the start
script. Using wildcard to include libraries shortens the classpath so that now
error occurs when executing the start script.

metafix-runner/build.gradle

@@ -2,6 +2,16 @@ plugins {
   id 'application'
 }
 
+application
+  startScripts {
+    doLast {
+        def winScriptFile  = file getWindowsScript()
+        def winFileText = winScriptFile.text
+        winFileText = winFileText.replaceAll('set CLASSPATH=.*', 'rem original CLASSPATH declaration replaced, see https://github.com/metafacture/metafacture-fix/issues/371:\nset CLASSPATH=%APP_HOME%\\\\lib\\\\\\*')
+        winScriptFile.text = winFileText
+    }
+  }
+
 dependencies {
   implementation project(':metafix')