Generate GenericConfig objects from MakeConfig objects.

Applies heuristics to the sequence of Blocks to do so.

Test: rm -rf out/config/ && m product-config-test product-config && java -jar out/host/linux-x86/testcases/product-config-test/product-config-test.jar && time ( out/host/linux-x86/bin/product-config --ckati_bin /source/kati/ckati > ~/Desktop/out.txt )
Change-Id: Id6763781bc876e2b2e0be320a7259c1ed41c2334