doxygen: Added subclasses to API

Update #3706.

RTEMS Application Loader, RTEMS Runtime Link Editor, Status Checks
and Test Support

cpukit/include/rtems/rtl/rap.h

@@ -28,6 +28,8 @@ extern "C" {
 /**
  * @defgroup rtems_rap RTEMS Application Loader
  *
+ * @ingroup RTEMSAPI
+ *
  * The module implements an application loader for files in the RAP format. The
  * RAP format is:
  *

cpukit/include/rtems/rtl/rtl.h

@@ -39,6 +39,8 @@ extern "C" {
 /**
  * @defgroup rtems_rtl RTEMS Runtime Link Editor
  *
+ * @ingroup RTEMSAPI
+ *
  * The module implements a runtime link editor with the standard dlopen, and
  * dlclose family of functions.
  *

cpukit/include/rtems/status-checks.h

@@ -31,6 +31,8 @@ extern "C" {
 
 /**
  * @defgroup rtems_status_checks Status Checks
+ *
+ * @ingroup RTEMSAPI
  */
 /**@{**/
 

cpukit/include/rtems/test.h

@@ -27,6 +27,8 @@ extern "C" {
 /**
  * @defgroup RTEMSTest Test Support
  *
+ * @ingroup RTEMSAPI
+ *
  * @brief Test support functions.
  *
  * @{