targets/zephyr: Rename from arduino_101, with more targets supported.

- Add preliminary support for ARC architecture.

Using "em_starterkit" board supported by Zephyr. Only build for this board
is tested, not booted on a real device due to lack of access. There's no
QEMU emulation support for ARC in Zephyr (yet) either.

- Update README to cover different Zephyr architectures/boards.

- Changed the arduino_101 paths to something more generic and adaptable
- Made sure it compiles and runs on Arduino 101

JerryScript-DCO-1.0-Signed-off-by: Sergio Martinez sergio.martinez.rodriguez@intel.com
JerryScript-DCO-1.0-Signed-off-by: Paul Sokolovsky paul.sokolovsky@linaro.org

targets/zephyr/src/jerry-entry.c

@@ -0,0 +1,45 @@
+/* Copyright 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdarg.h>
+
+#include "jerry-port.h"
+
+/**
+ * Provide log message to filestream implementation for the engine.
+ */
+int jerry_port_logmsg (FILE *stream, const char *format, ...)
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stream, format, args);
+  va_end (args);
+  return count;
+} /* jerry_port_logmsg */
+
+
+/**
+ * Provide error message to console implementation for the engine.
+ */
+int jerry_port_errormsg (const char *format, ...)
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stderr, format, args);
+  va_end (args);
+  return count;
+} /* jerry_port_errormsg */