Emit and parse the product config variables from kati/make

Test: cls && 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 ( product-config --ckati_bin /source/kati/ckati > ~/Desktop/out.txt )
Change-Id: I52e5c07f9aaf899f9d45680313275c6d9e246ff2