Add log header to assembly output (#772) #126

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	28m 51s
ci (a6osx, macos-12)	17m 49s
ci (ta6osx, macos-12)	21m 23s
ci (i3le, ubuntu-22.04)	12m 44s
ci (ti3le, ubuntu-22.04)	15m 58s
ci (a6le, ubuntu-22.04)	8m 55s
ci (ta6le, ubuntu-22.04)	12m 2s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	9m 1s
ci (i3nt, windows-2022, vs)	11m 59s
ci (ti3nt, windows-2022, vs)	14m 20s
ci (a6nt, windows-2022, vs)	12m 39s
ci (ta6nt, windows-2022, vs)	15m 58s
ci (ta6nt, windows-2022, gcc)	13m 51s
	3h 15m 30s

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