decompiler: fixed incorrect line mapping after abstract and native methods

testData/src/pkg/TestAbstractMethods.java

@@ -0,0 +1,19 @@
+package pkg;
+
+import java.lang.Override;
+import java.lang.Runnable;
+
+public abstract class TestAbstractMethods {
+
+  public abstract void foo();
+
+  public int test(int a) {
+    return a;
+  }
+
+  protected abstract void foo1();
+
+  public void test2(String a) {
+    System.out.println(a);
+  }
+}