debian: Use same version of kotlin for bootstrap as the code

Sunil Mohan Adaparequested to merge
sunilmohan/kotlin:bootstrap-same-version into master

Currently, in the first stage of compilation, we build Debian package 1.3.31 using upstream compiler version 1.3.30-eap-28. After that we changed this dependency to 1.3.30 (actually 1.3.31 in disguise) and rebuild the Debian package in second stage.

Simply this by using upstream compiler version 1.3.31 for build the code (which is version 1.3.31) in stage1. In the second stage, simply install the built package in stage1 and use that for build. There is no need to change the compiler version that we are dependent on. There is also now minimal difference in stage1 build and stage2 build. Any problems with the build get easily highlighted.

cc: @emorrp1

I am using the bootstrap script but others are using kotlin-deps.deb. So everyone needs be on the same page with the bootstrap version. However, this is a nice simplification.

Edited by emorrp1

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