Affects Version/s: None
Fix Version/s: None
Bigtop may manage apache patches.
Motivation 1: component build fails due to some apache patches. bigtop don't need to wait for component rebase to workaround component build failure.
Example 1) Hadoop build fails in bigtop-0.6.0/bigtop-0.7.0 build fails due to
Example 2) flume 1.4.0 build fails due to Flume-2172
Motivation 2: third party can use bigtop to manage apache or vendor patches (Not bigtop goal, but if more people use bigtop to do distribution, bigtop is more stable)