add out of line definition test

Author: vinniefalco

test-files/old-tests/out-of-line-record-def.cpp

@@ -0,0 +1,8 @@
+namespace N
+{
+    struct S;
+}
+
+struct N::S
+{
+};

test-files/old-tests/out-of-line-record-def.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mrdox xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="https://github.com/cppalliance/mrdox/raw/develop/mrdox.rnc">
+<namespace name="">
+  <namespace name="N" id="rjlMNXAaWNMkQYMTJzRA1DR0DiE=">
+    <struct name="S" id="BOgJOhZPKKMy9QBLYD1JPMD1Doc=">
+      <file path="out-of-line-record-def.cpp" line="6" class="def"/>
+      <file path="out-of-line-record-def.cpp" line="3"/>
+    </struct>
+  </namespace>
+</namespace>
+</mrdox>