dist/tools/compile_and_test_for_board: add compile and test script

Move the compile and test script from Release-Specs.
https://github.com/RIOT-OS/Release-Specs/blob/271dc8/02-tests/compile_and_test_for_board.py

By default it should be run as

    ./compile_and_test_for_board.py path_to_riot_directory board_name [results]

The script is migrated as-is so has not been changed to automatically use the
current repository.

dist/tools/compile_and_test_for_board/README.md

+Compile and Test one board
+==========================
+
+
+The `./compile_and_test_for_board.py` script can be used to run all compilation
+and **automated** tests for one board, not the manual tests.
+
+
+Usage
+-----
+
+    ./compile_and_test_for_board.py path_to_riot_directory board_name [results]
+
+It prints the summary with results files relative to `results_dir/board` to have
+a github friendly output.
+
+Failures and all tests output are saved in files.
+They can be checked with:
+
+    find results/ -name '*.failed'
+    find results/ -name 'test.success'