Make SOOT not crash on JVMs newer than version 8.

Stop trying to access system properties "sun.boo.class.path" and
"java.ext.dirs" which got removed from those never versions. For
our usecase those classes are not need since we anyway model library
methods via policies.

Author: ml86

generated/jastadd/soot/JastAddJ/Program.java

@@ -329,24 +329,18 @@ public void initPaths() {
       ArrayList classPaths = new ArrayList();
       ArrayList sourcePaths = new ArrayList();
 
-      String[] bootclasspaths;
-      if(options().hasValueForOption("-bootclasspath"))
-        bootclasspaths = options().getValueForOption("-bootclasspath").split(File.pathSeparator);
-      else
-        bootclasspaths = System.getProperty("sun.boot.class.path").split(File.pathSeparator);
-      for(int i = 0; i < bootclasspaths.length; i++) {
-        classPaths.add(bootclasspaths[i]);
-        //System.err.println("Adding classpath " + bootclasspaths[i]);
+      if(options().hasValueForOption("-bootclasspath")) {
+        String[] bootclasspaths = options().getValueForOption("-bootclasspath").split(File.pathSeparator);
+        for(int i = 0; i < bootclasspaths.length; i++) {
+          classPaths.add(bootclasspaths[i]);
+        }
       }
-      
-      String[] extdirs;
-      if(options().hasValueForOption("-extdirs"))
-        extdirs = options().getValueForOption("-extdirs").split(File.pathSeparator);
-      else
-        extdirs = System.getProperty("java.ext.dirs").split(File.pathSeparator);
-      for(int i = 0; i < extdirs.length; i++) {
-        classPaths.add(extdirs[i]);
-        //System.err.println("Adding classpath " + extdirs[i]);
+
+      if(options().hasValueForOption("-extdirs")) {
+        String[] extdirs = options().getValueForOption("-extdirs").split(File.pathSeparator);
+        for(int i = 0; i < extdirs.length; i++) {
+          classPaths.add(extdirs[i]);
+        }
       }
 
       String[] userClasses = null;