Added missing file.

testdata/lym/b_inc.rb

@@ -0,0 +1,5 @@
+
+def f
+  raise("An error")
+end
+

testdata/lym/m3.rb

@@ -0,0 +1,12 @@
+
+# %include b_inc.rb
+
+begin
+  puts f
+rescue => ex
+  ln = ex.backtrace[0].split(":")
+  # NOTE: as the backtrace is a native Ruby feature, include file translation
+  # does not happen. We need to do this explicitly here:
+  puts ex.to_s + " in " + RBA::Macro::real_path(ln[0], ln[1].to_i) + ":" + RBA::Macro::real_line(ln[0], ln[1].to_i).to_s
+end
+