redbee-econotag: fix maca

I suspect that the transceiver will still not work as there are many
many warnings, but at least it builds now.

closes: #676
fix setsvar typo
tests: fix test_hwtimer_spin

Actually test hwtimer_spin, not hwtimer_arch*

`hwtimer_wait` calls `hwtimer_spin` only for delays `<= 6`, that's why a
pure test_hwtimer_spin test should not pass values `>6`.
Also decrement delay in steps of 1.
tests: add test_hwtimer_wait

It contains the old test functionality of test_hwtimer_spin.
Merge pull request #1044 from LudwigOrtmann/issue_715

tests: fix test_hwtimer_spin
Merge pull request #1031 from LudwigOrtmann/issue_676

redbee-econotag: fix maca
Add "compile everything" tool

Having many tests is quite futile if they aren't executed once in a
while<sup>[citation needed]</sup>.

Alas, this is not the purpose of this PR. This PR adds the tool
"compile_test.py", which executes `make buildtest` for all applications
in `examples` and `tests`, and prints a comprehensive list of the
results.
Merge pull request #1048 from Kijewski/compile_test

Add "compile everything" tool