Capture command-line builds which fail due to bad targets

Toaster currently can't catch build failures which are due to bad targets (e.g. "bitbake ecky-thump"), as the bitbake run doesn't reach the BuildStarted event in these cases.

Add a new BuildInit event which fires as soon as buildTargets() or buildFile() is invoked, and make the build object at this point. When BuildStarted fires, collect layer information, build variables etc. as previously.

Backwards-compatibility is maintained for jethro by still making a build object on BuildStarted events. jethro builds which fail early will therefore not be captured by the new code, but existing functionality should not be broken either.

To test:

1. Start Toaster.
2. On the command-line, run a build with a bad target like "bitbake ecky-thump".
3. The build should register as a failure on the "all builds" page.

The following changes since commit fb8349b97c736d6633b2d79a4003dd86f760bdb1 (toaster-next):

toaster: bin/toaster Fix noweb command (2016-04-21 14:19:05 +0100)

are available in the git repository at:

git://git.yoctoproject.org/poky-contrib elliot/toaster/failed_builds-8440-v6
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=elliot/toaster/failed_builds-8440-v6

Elliot Smith (2):
cooker: add BuildInit event
toasterui: use BuildInit to capture builds with bad targets

 bitbake/lib/bb/cooker.py             |  6 ++++++
 bitbake/lib/bb/event.py              |  6 +++++-
 bitbake/lib/bb/ui/buildinfohelper.py | 17 ++++++++++-------
 bitbake/lib/bb/ui/toasterui.py       | 19 ++++++++-----------
 4 files changed, 29 insertions(+), 19 deletions(-)

--
1.9.3

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