Bump cc from 1.2.4 to 1.2.9 #431

Job	Run time
docs-pr	5s
spell check with typos	6s
build-on-windows (windows-debug)	50s
build-on-linux (linux-kvm-debug)	1m 14s
build-on-windows (windows-release)	55s
build-on-linux (linux-kvm-release)	1m 34s
build-on-linux (linux-hyperv-debug)	1m 31s
build-on-linux (linux-hyperv-release)	1m 34s
fuzzing / fuzz	9m 34s
rust / build (hyperv, amd, debug)	6m 34s
rust / build (hyperv, amd, release)	6m 34s
rust / build (hyperv, intel, debug)	6m 43s
rust / build (hyperv, intel, release)	6m 43s
rust / build (mshv, amd, debug)	7m 25s
rust / build (mshv, amd, release)	7m 0s
rust / build (mshv, intel, debug)	7m 25s
rust / build (mshv, intel, release)	7m 31s
rust / build (kvm, amd, debug)	7m 56s
rust / build (kvm, amd, release)	7m 52s
rust / build (kvm, intel, debug)	7m 38s
rust / build (kvm, intel, release)	7m 52s
	1h 44m 36s

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