Consolidate ./dev tests info into 1 place [1/1]

Consolidated "./dev tests" info into 1 place.  Made a few tweaks to dev tests info.  Fixed typo.


 doc/devguide/devtool-build.md    |   13 +++----------
 doc/devguide/devtool.md          |   11 +----------
 doc/misc_docs/testing/devtool.md |   27 ++++++++++++++-------------
 3 files changed, 18 insertions(+), 33 deletions(-)

Crowbar-Pull-ID: 5d29cb40726cb17789719a868b0c06d5fc54c915

Crowbar-Release: development