Split unit tests into separate directories (#1761)

The unit tests should follow the component structure, so this patch
moves all `jerry-core` unit tests under `tests/unit-core` and the
`jerry-libm` unit tests under `tests/unit-libm`.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

tools/gen-test-libm.sh

@@ -15,5 +15,5 @@
 # limitations under the License.
 
 make -C tools/unit-tests build
-tools/unit-tests/gen-test-libm >tests/unit/test-libm.inc.h
+tools/unit-tests/gen-test-libm >tests/unit-libm/test-libm.inc.h
 make -C tools/unit-tests clean

tools/unit-tests/gen-test-libm.c

@@ -32,7 +32,7 @@
 int
 main (int argc, char **args)
 {
-  printf ("/* Copyright JS Foundation and other contributors, http://js.foundation
+  printf ("/* Copyright JS Foundation and other contributors, http://js.foundation\n"
           " *\n"
           " * Licensed under the Apache License, Version 2.0 (the \"License\");\n"
           " * you may not use this file except in compliance with the License.\n"
@@ -47,10 +47,9 @@ main (int argc, char **args)
           " * limitations under the License.\n"
           " */\n"
           "\n"
-          "/*\n"
-          " * Generated by tools/gen-test-libm.sh\n"
-          " * DO NOT EDIT!!!\n"
-          " */\n");
+          "/* This file is automatically generated by the gen-test-libm.sh script.\n"
+          " * Do not edit! */\n"
+          "\n");
 
   /* acos tests */
   GEN_DBL_TEST (acos (0.0));