Put classpath in main jar manifest

We encounter issues launching nouveau on Windows as it cAnnoT
haNdle LoNG LiNEs iN ScripTs. Instead we list the dependency
jars in the manifest and only need to include one jar in the
classpath.

nouveau/build.gradle

@@ -49,7 +49,11 @@ java {
 }
 
 jar {
-    manifest.attributes('Multi-Release': 'true')
+    manifest {
+        attributes(
+            'Multi-Release': 'true',
+            "Class-Path": configurations.runtimeClasspath.collect { it.getName() }.join(' '))
+    }
 }
 
 spotless {
@@ -82,3 +86,8 @@ tasks.withType(AbstractArchiveTask) {
     preserveFileTimestamps = false
     reproducibleFileOrder = true
 }
+
+
+startScripts {
+    classpath = files(jar.archiveFileName)
+}