These are BOSCO tarballs for several platforms.
They are the stripped tarballs from the 8.8.1 release.
They were built in the NMI lab from the head of 
the V8_8_1-branch (e5bdf81196e19ac).
The NMI run id 461773
boscoinstaller is a copy of bosco_findplatform in the source tree.
bosco_quickstart is copied out of the source tree.