Bump cc from 1.2.4 to 1.2.7 #429

Job	Run time
docs-pr	5s
spell check with typos	7s
build-on-linux (linux-kvm-debug)	1m 12s
build-on-windows (windows-debug)	37s
build-on-linux (linux-kvm-release)	1m 21s
build-on-windows (windows-release)	48s
build-on-linux (linux-hyperv-debug)	1m 25s
build-on-linux (linux-hyperv-release)	1m 32s
fuzzing / fuzz	9m 47s
rust / build (hyperv, amd, debug)	17m 36s
rust / build (hyperv, amd, release)	23m 38s
rust / build (hyperv, intel, debug)	17m 8s
rust / build (hyperv, intel, release)	22m 45s
rust / build (mshv, amd, debug)	12m 2s
rust / build (mshv, amd, release)	15m 2s
rust / build (mshv, intel, debug)	10m 50s
rust / build (mshv, intel, release)	13m 56s
rust / build (kvm, amd, debug)	12m 42s
rust / build (kvm, amd, release)	15m 35s
rust / build (kvm, intel, debug)	11m 17s
rust / build (kvm, intel, release)	14m 27s
	3h 23m 52s

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