bitbake: tests: Add initial scenario based test for runqueue

We need some tests for runqueue, its been something which has been hard to test
for a long time. Add some dummy metadata to allow this, mirroring the OE
structure in spirit.

(Bitbake rev: 37564d7440c5d7aa05ec537f3b79026b1c83bb68)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/tests/runqueue-tests/conf/bitbake.conf

@@ -0,0 +1,11 @@
+CACHE = "${TOPDIR}/cache"
+THISDIR = "${@os.path.dirname(d.getVar('FILE'))}"
+COREBASE := "${@os.path.normpath(os.path.dirname(d.getVar('FILE')+'/../../'))}"
+BBFILES = "${COREBASE}/recipes/*.bb"
+PROVIDES = "${PN}"
+PN = "${@bb.parse.vars_from_file(d.getVar('FILE', False),d)[0]}"
+PF = "${BB_CURRENT_MC}:${PN}"
+export PATH
+STAMP = "${TOPDIR}/stamps/${PN}"
+T = "${TOPDIR}/workdir/${PN}/temp"
+BB_NUMBER_THREADS = "4"