unittests: Move tests-core into subdirectoy

tests/unittests/tests-core/Makefile

@@ -0,0 +1,3 @@
+MODULE = tests-core
+
+include $(RIOTBASE)/Makefile.base

tests/unittests/tests-core/tests-core.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2014 Martin Lenders
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+#include "tests-core.h"
+
+void tests_core(void)
+{
+    TESTS_RUN(tests_core_atomic_tests());
+    TESTS_RUN(tests_core_bitarithm_tests());
+    TESTS_RUN(tests_core_cib_tests());
+    TESTS_RUN(tests_core_clist_tests());
+    TESTS_RUN(tests_core_lifo_tests());
+    TESTS_RUN(tests_core_queue_tests());
+}

tests/unittests/tests-core/tests-core.h

@@ -18,7 +18,13 @@
  */
 #ifndef __TESTS_CORE_H_
 #define __TESTS_CORE_H_
-#include "embUnit/embUnit.h"
+
+#include "../unittests.h"
+
+/**
+ * @brief   The entry point of this test suite.
+ */
+void tests_core(void);
 
 /**
  * @brief   Generates tests atomic.h