Add test to demonstrate issue #45

This is failing with gcc5 + castxml + std=c++11 flag with the
following error:

parsing files - started
DEBUG Reading project files: file by file
INFO Parsing source file "test.h" ...
DEBUG Reading source file: [test.h].
DEBUG File has not been found in cache, parsing...
DEBUG castxml cmd: /usr/bin/castxml  -std=c++11   -I. -c -x c++ --castxml-cc-gnu  "(" /usr/bin/clang -std=c++11 ")" --castxml-gccxml -o /tmp/tmpmsq0r7kr.xml test.h
DEBUG CASTXML version - None ( 1.136 )
<snip>
  File "/usr/local/lib/python3.4/dist-packages/pygccxml-1.7.2-py3.4.egg/pygccxml/parser/project_reader.py", line 544, in _relink_declarated_types
Exception: Unable to find out actual class definition: ''.
Class definition has been changed from one compilation to an other.
Why did it happen to me? Here is a short list of reasons:
    1. There are different preprocessor definitions applied on same file during compilation
    2. Bug in pygccxml.

Author: iMichka

unittests/data/test_map_gcc5.hpp

@@ -0,0 +1,11 @@
+// Copyright 2014-2016 Insight Software Consortium.
+// Distributed under the Boost Software License, Version 1.0.
+// See http://www.boost.org/LICENSE_1_0.txt
+
+#include <map>
+
+using namespace std;
+
+class mytest {
+    map<int, int> mymap;
+};

unittests/test_all.py

@@ -70,6 +70,7 @@
 import test_copy_constructor
 import test_cpp_standards
 import unnamed_classes_tester
+import test_map_gcc5
 
 testers = [
     # , demangled_tester # failing right now
@@ -132,7 +133,8 @@
     test_va_list_tag_removal,
     test_copy_constructor,
     test_cpp_standards,
-    unnamed_classes_tester
+    unnamed_classes_tester,
+    test_map_gcc5
 ]
 
 if 'posix' in os.name:

unittests/test_map_gcc5.py

@@ -0,0 +1,45 @@
+# Copyright 2014-2016 Insight Software Consortium.
+# Distributed under the Boost Software License, Version 1.0.
+# See http://www.boost.org/LICENSE_1_0.txt
+
+import unittest
+import parser_test_case
+
+from pygccxml import parser
+from pygccxml import utils
+from pygccxml import declarations
+
+
+class tester_t(parser_test_case.parser_test_case_t):
+
+    def __init__(self, *args):
+        parser_test_case.parser_test_case_t.__init__(self, *args)
+        self.header = "test_map_gcc5.hpp"
+        self.config.cflags = "-std=c++11"
+
+    def test_map_gcc5(self):
+        """
+        The code in test_map_gcc5.hpp was breaking pygccxml.
+
+        Test that case (gcc5 + castxml + c++11). See issue #45
+
+        """
+
+        if self.config.xml_generator == "gccxml":
+            return
+
+        decls = parser.parse([self.header], self.config)
+        self.global_ns = declarations.get_global_namespace(decls)
+
+
+def create_suite():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(tester_t))
+    return suite
+
+
+def run_suite():
+    unittest.TextTestRunner(verbosity=2).run(create_suite())
+
+if __name__ == "__main__":
+    run_suite()