Initialize CLOG to fix crashing unit tests

Initialize CLOG in the blendfile-loading unit test superclass. Since
rB8683d4e88f2e CLOG is used by more areas in Blender, and without
initialisation it crashes.

source/blender/blenloader/CMakeLists.txt

@@ -34,6 +34,7 @@ set(INC
   ../sequencer
   ../windowmanager
   ../../../intern/guardedalloc
+  ../../../intern/clog
 
   # for writefile.c: dna_type_offsets.h
   ${CMAKE_BINARY_DIR}/source/blender/makesdna/intern

source/blender/blenloader/tests/blendfile_loading_base_test.cc

@@ -48,6 +48,8 @@
 #include "WM_api.h"
 #include "wm.h"
 
+#include "CLG_log.h"
+
 BlendfileLoadingBaseTest::~BlendfileLoadingBaseTest()
 {
 }
@@ -58,12 +60,14 @@ void BlendfileLoadingBaseTest::SetUpTestCase()
 
   /* Minimal code to make loading a blendfile and constructing a depsgraph not crash, copied from
    * main() in creator.c. */
+  CLG_init();
   BLI_threadapi_init();
 
   DNA_sdna_current_init();
   BKE_blender_globals_init();
 
   BKE_idtype_init();
+  BKE_appdir_init();
   IMB_init();
   BKE_images_init();
   BKE_modifier_init();
@@ -100,6 +104,8 @@ void BlendfileLoadingBaseTest::TearDownTestCase()
 
   BKE_tempdir_session_purge();
 
+  CLG_exit();
+
   testing::Test::TearDownTestCase();
 }