libcurl on CentOS 6 doesn't support keealive, so we upgrade it.
The approach we take to avoid breaking buildbot machines is to
grab libcurl from CentOS 7, build it on CentOS 6 and upload rpms
to S3.
--HG--
extra : commitid : 2GvcMp3e9R5
extra : rebase_source : feb7c60beafebc7923e5ad2f0f6af963eaebb638
libcurl shipped with CentOS 6 doesn't support keepalive. This is causing
builds to burn.
--HG--
extra : commitid : 9uFaPdBg2DL
extra : rebase_source : 1e94ef529697818a9a74f0c47b31dfdbaddc31f8
* split much of base-build that's not useful for Android into b2g-build
* always run docker with --no-cache, so we get the latest packages
* improve README
--HG--
extra : rebase_source : 9446b68ae0ffd7cbdd2da831e208019a6974a636
extra : source : 91164440e535825949a2e7dda8909da2f6085dff
extra : histedit_source : 5b9e14c8714f1cbb1853e1ecdc3e3e9918830ce2