tests: Use floating point task

These tests directly or indirectly use fprintf(), etc. which may use the
floating point unit.

Update #3076.

testsuites/sptests/sp20/init.c

@@ -76,7 +76,7 @@ rtems_task Init(
       Priorities[ index ],
       RTEMS_MINIMUM_STACK_SIZE,
       RTEMS_DEFAULT_MODES,
-      RTEMS_DEFAULT_ATTRIBUTES,
+      RTEMS_FLOATING_POINT,
       &Task_id[ index ]
     );
     directive_failed( status, "rtems_task_create loop" );

testsuites/sptests/sp20/system.h

@@ -43,6 +43,8 @@ void Get_all_counters( void );
 
 #define CONFIGURE_INIT_TASK_PRIORITY          10
 #define CONFIGURE_INIT_TASK_INITIAL_MODES     RTEMS_DEFAULT_MODES
+#define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_FLOATING_POINT
+
 #define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
 
 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE