Remove autoconf generates files

Including the files that were automatically generated by autoconf caused
a lot of trouble in the past. This was mainly due to the fact that git
does not save timestamps of files, and then autotools thought it needs
to autoreconf. This often times failed due to different versions of
autotools being installed on the build machine vs the developer's

Let's try to solve this issue by not including any auto generated files.
Instead, let's have buildroot run autoreconf.

Change-Id: I2b5e330eb33d01d51cd2d9b883baaf740b3baa19
31 files changed