bsps: Move startup files to bsps

Adjust build support files to new directory layout.

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/sparc/shared/start/bsp_fatal_exit.c

@@ -0,0 +1,22 @@
+/**
+ * @file
+ * @ingroup sparc_bsp
+ * @brief ERC32/LEON2/LEON3 BSP specific exit handler.
+ */
+
+/*
+ *  COPYRIGHT (c) 2014.
+ *  Aeroflex Gaisler AB.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp.h>
+#include <rtems/score/cpu.h>
+
+void BSP_fatal_exit(uint32_t error)
+{
+  sparc_syscall_exit(RTEMS_FATAL_SOURCE_BSP, error);
+}