build

enable thinLTO #603

Job	Run time
spellcheck	4s
reuse-check	9s
shellcheck	7s
linux-glibc-debian-testing-llvm	6m 31s
linux-glibc-debian-bookworm-gcc	4m 59s
linux-glibc-debian-sid-gcc-riscv64	3m 23s
linux-glibc-debian-sid-llvm-riscv64	3m 47s
linux-glibc-debian-testing-gcc	5m 42s
linux-musl-alpine-gcc	2m 54s
linux-musl-debian-bookworm-gcc	5m 45s
linux-musl-alpine-llvm	3m 40s
linux-musl-debian-bookworm-llvm	6m 2s
linux-musl-debian-sid-gcc-riscv64	3m 14s
linux-musl-debian-sid-llvm-riscv64	3m 37s
linux-musl-debian-testing-gcc	5m 14s
linux-musl-debian-testing-llvm	6m 1s
linux-musl-from-mac	7m 48s
mac-clang	8m 53s
mac-llvm	18m 20s
win-gcc	5m 47s
win-llvm	9m 47s
linux-glibc-debian-bookworm-llvm	6m 12s
	1h 57m 56s

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