[glibmm] tests/Makefile.am: Fix a typo to fix the build.

[Murray Cumming <murrayc src gnome org>]

commit 72bb52f44a813b871af3028653cb72e851edfa77
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Apr 26 09:50:50 2017 +0200

    tests/Makefile.am: Fix a typo to fix the build.

 tests/Makefile.am |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 7231b70..b8c5606 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -104,10 +104,11 @@ glibmm_interface_move_test_CXXFLAGS = $(GLIBMM_INTERFACE_TEST_WXXFLAGS) $(cxxfla
 glibmm_mainloop_test_SOURCES             = glibmm_mainloop/main.cc
 glibmm_nodetree_test_SOURCES             = glibmm_nodetree/main.cc
 glibmm_object_test_SOURCES               = glibmm_object/main.cc \
-                                          glibmm/object/test_derived_object.h
-glibmm_object_move_test_SOURCES          = glibmm_object_move/main.cc
+                                          glibmm_object/test_derived_object.h
+glibmm_object_move_test_SOURCES          = glibmm_object_move/main.cc \
+                                          glibmm_object/test_derived_object.h
 glibmm_objectbase_test_SOURCES           = glibmm_objectbase/main.cc \
-                                          glibmm/objectbase/test_derived_objectbase.h
+                                          glibmm_objectbase/test_derived_objectbase.h
 glibmm_objectbase_move_test_SOURCES      = glibmm_objectbase_move/main.cc
 glibmm_ustring_compose_test_SOURCES      = glibmm_ustring_compose/main.cc
 glibmm_ustring_format_test_SOURCES       = glibmm_ustring_format/main.cc