I am firing a build on a perticular time like 17:07:53
it will take some time to compile all the binaries.
After all the operation it will generates a log file,
which contains all the information about the build
as build start-time 17:07:53 and end_time as 17:39:31.
by using these times how can i calculate total time
taken for this build.Is there any way to subtract
two times as numeric and get the sutracted result to again
convert it as timeformat.