Added generated jar files to gitignore

These files are generated during SDK build and make the working tree
dirty after the build:

```
git status
On branch master
Untracked files:
  (use "git add <file>..." to include in what will be committed)
        org.eclipse.jdt.debug.tests/javadebugtests.jar
        org.eclipse.jdt.debug/jdimodel.jar
```

Author: iloveeclipse

org.eclipse.jdt.debug.tests/.gitignore

@@ -0,0 +1 @@
+/javadebugtests.jar

org.eclipse.jdt.debug/.gitignore

@@ -1 +1,2 @@
 /jdi-bin/
+/jdimodel.jar