[test] Fixed compilation warning in coverage build. JB#33786

test_log.c:81:5: warning: implicit declaration of function 'gutil_log_assert'
   81 |     gutil_log_assert(NULL, GLOG_LEVEL_WARN, "Test!", __FILE__, __LINE__);
      |     ^~~~~~~~~~~~~~~~

test/test_log/Makefile

@@ -1,6 +1,6 @@
 # -*- Mode: makefile-gmake -*-
 
-CFLAGS += -DGLOG_LEVEL_MAX=GLOG_LEVEL_VERBOSE
+CFLAGS += -DGLOG_LEVEL_MAX=GLOG_LEVEL_VERBOSE -DGLOG_LEVEL_ASSERT=GLOG_LEVEL_ALWAYS
 EXE = test_log
 
 include ../common/Makefile