Fix double free abort in gtest-gnc-datetime.cpp

This double free happened after the introduction of a class variable (static member variable
to GndDate and the test compiling in gnc-datetime.cpp *and* at the same time linking to
gnc-qof. This apparently threw off internal memory management. Removing either of linking to
gnc-qof or compiling in the source file solved it.
Credits go to John Ralls for debugging this.

src/libqof/qof/test/CMakeLists.txt

@@ -129,8 +129,11 @@ IF (NOT WIN32)
 
   SET(test_gnc_datetime_SOURCES
     ${MODULEPATH}/gnc-datetime.cpp
+    ${MODULEPATH}/gnc-timezone.cpp
+    ${MODULEPATH}/gnc-date.cpp
+    ${MODULEPATH}/qoflog.cpp
     gtest-gnc-datetime.cpp
     ${GTEST_SRC})
   GNC_ADD_TEST(test-gnc-datetime "${test_gnc_datetime_SOURCES}"
-    gtest_qof_INCLUDES gtest_old_qof_LIBS)
+    gtest_qof_INCLUDES gtest_qof_LIBS)
 ENDIF()

src/libqof/qof/test/Makefile.am

@@ -212,6 +212,8 @@ check_PROGRAMS += test-gnc-timezone
 test_gnc_datetime_SOURCES = \
         $(top_srcdir)/$(MODULEPATH)/gnc-datetime.cpp \
         $(top_srcdir)/$(MODULEPATH)/gnc-timezone.cpp \
+        $(top_srcdir)/$(MODULEPATH)/gnc-date.cpp \
+        $(top_srcdir)/${MODULEPATH}/qoflog.cpp \
         gtest-gnc-datetime.cpp
 test_gnc_datetime_CPPFLAGS =\
         -I$(GTEST_HEADERS) \
@@ -221,10 +223,9 @@ test_gnc_datetime_CPPFLAGS =\
         $(BOOST_CPPFLAGS)
 
 test_gnc_datetime_LDADD = \
-        -lboost_date_time \
-        ${top_builddir}/${MODULEPATH}/libgnc-qof.la \
         $(GLIB_LIBS) \
-        $(GTEST_LIBS)
+        $(GTEST_LIBS) \
+        ${BOOST_LDFLAGS} -lboost_regex -lboost_date_time
 if !GOOGLE_TEST_LIBS
 nodist_test_gnc_datetime_SOURCES = \
         $(GTEST_SRC)/src/gtest_main.cc