build_specification.xml: Add byt
disable byt piglit tests except daily builds

For now, add a check to the piglit build to quit if the type is not
daily.  This allows us to enable piglit tests for that hardware,
whithout incurring 2hr delays in the build.

This change should be reverted when the build specification file can
explicitly set the type for prerequisites.
Merge pull request #1 from dcbaker/hardware-byt

build_specification.xml: Add byt
fix daily builds

A semantic error was introduced with the previous daily check.

Increased daily timeouts to support slow BYT tests.
allow type-specific prerequisites

with the introduction of byt testers, test runs can take in excess of
2 hours.  This patch allows prerequisites to trigger builds only for
specific types, via the "only_for_type" attribute to the prequisite
tag.

the short-circuit of tests in piglit-test build.py was removed, as it
has been replaced by this mechanism.

Also, build_local.py was improved to skip hardware-specific builds.
remove wip piglit branch

Dylan push junit patches to master, so the wip branch is no longer
necessary.
switch piglit from Dylan's repo to the origin

Dylan had wip modifications enabling junit.  Now that they have been
merged, we need to use the origin.
enable GLESv1 and GLESv2 in mesa build

Surprisingly, GLES libraries are not built by default in mesa.  This
commit adds the necessary build options to enable them.