[Bug ld/27452] ld: Support compressing arbitrary sections (generalized --compress-debug-sections=)

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=27452

--- Comment #3 from Fangrui Song <i at maskray dot me> ---
The actual form I plan to use in lld is:

--compress-sections <section-glob>={none,zlib,zstd}[:level]

zstd excels at scaling from low-ratio-very-fast to
high-ratio-pretty-slow. Some users prioritize speed and prefer disk read
speed, while others focus on achieving the highest compression ratio
possible, similar to traditional high-ratio codecs like LZMA.

e.g. ld.lld --compress-sections '.debug_*=1'

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