bb: bump lock timeout to 30 seconds.
bb: bump lock timeout to 30 seconds.

Some VMs are just slow.

rminnich/u-root,u-root/u-root,u-root/u-root,hugelgupf/u-root,rminnich/u-root,hugelgupf/u-root,u-root/u-root,rminnich/u-root,hugelgupf/u-root,rminnich/u-root,hugelgupf/u-root,GanShun/u-root,GanShun/u-root,GanShun/u-root