Added gitignore rules to files which are generated after running the mkbuild script.

- This helps make sure that the build files don't get tracked in the git tracker.
2 jobs from master in 36 minutes 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Hamara Sugam Amd64
passed #1043
allowed to fail
build-hamara-sugam-amd64

17:46

 
  Build Hamara Sugam I386
passed #1044
build-hamara-sugam-i386

19:11