rtems: Add header files to Doxygen groups

cpukit/include/rtems/rtems/attr.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicAttr
+ *
  * @brief This header file provides Classic API directive attributes.
  */
 

cpukit/include/rtems/rtems/barrier.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicBarrier
+ *
  * @brief This header file defines the Barrier Manager API.
  */
 

cpukit/include/rtems/rtems/clock.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicClock
+ *
  * @brief This header file defines the Clock Manager API.
  */
 

cpukit/include/rtems/rtems/message.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicMessage
+ *
  * @brief This header file defines the Message Manager API.
  */
 

cpukit/include/rtems/rtems/ratemon.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicRateMonotonic
+ *
  * @brief This header file defines the Rate-Monotonic Manager API.
  */
 

cpukit/include/rtems/rtems/sem.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicSemaphore
+ *
  * @brief This header file defines the Semaphore Manager API.
  */
 

cpukit/include/rtems/rtems/tasks.h

@@ -3,6 +3,8 @@
 /**
  * @file
  *
+ * @ingroup RTEMSImplClassicTask
+ *
  * @brief This header file defines the main parts of the Tasks Manager API.
  */