Fix style issues

Author: dominikmascherbauer

substratevm/src/com.oracle.objectfile/src/com/oracle/objectfile/debugentry/ClassEntry.java

@@ -201,7 +201,7 @@ public int getFileIdx(FileEntry file) {
         return indexedFiles.get(file);
     }
 
-    private DirEntry getDirEntry(FileEntry file) {
+    private static DirEntry getDirEntry(FileEntry file) {
         if (file == null) {
             return null;
         }

substratevm/src/com.oracle.objectfile/src/com/oracle/objectfile/debugentry/LocalEntry.java

@@ -42,8 +42,8 @@ public String toString() {
         return String.format("Local(%s type=%s slot=%d line=%d)", name, type.getTypeName(), slot, getLine());
     }
 
-    public void setLine(int line) {
-        this.line.set(line);
+    public void setLine(int newLine) {
+        this.line.set(newLine);
     }
 
     public int getLine() {