[software] License added. #2185

Job	Run time
check-opcodes	4s
riscv-isa-sim	13s
tc-gcc	25s
verilator	8s
tc-llvm	48s
verilator-model (minpool)	6s
verilator-model (mempool)	11m 51s
check-bootrom	13s
build-apps-gcc (minpool)	18s
build-apps-gcc (mempool)	21s
tc-halide	8s
build-apps-llvm (minpool)	1m 10s
build-apps-llvm (mempool)	1m 3s
build-apps-halide (minpool)	1m 13s
build-apps-halide (mempool)	39s
run-apps-halide (minpool)	10s
unit-test	2m 24s
run-apps-halide (mempool)	17s
run-apps-gcc	0s
run-apps-llvm	0s
clean-up	4s
clean-up-compile-runs (minpool)	5s
clean-up-compile-runs (mempool)	3s
	21m 43s

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