`zig cc` combines `--strip-all` and `--strip-debug`

[Bownairo]

Zig Version

0.14.0

Steps to Reproduce and Observed Behavior

zig cc handles --strip-all and --strip-debug as the same, so stripping is all or nothing.

---

With gcc, there are three distinct strip configurations:

$ cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=430838d8f4b10293753bed30eddfd37193914521, for GNU/Linux 3.2.0, with debug_info, not stripped

$ RUSTFLAGS="-C link-args=-Wl,--strip-debug" cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=070bef503e2d64752c27ea7831b1b51e2601f4df, for GNU/Linux 3.2.0, not stripped

$ RUSTFLAGS="-C link-args=-Wl,--strip-all" cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=f21f0136208958ff93512fecc20b59bcbb576f65, for GNU/Linux 3.2.0, stripped

With zig cc, there are only two:

$ cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.0.0, with debug_info, not stripped

$ RUSTFLAGS="-C link-args=-Wl,--strip-debug" cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.0.0, stripped

$ RUSTFLAGS="-C link-args=-Wl,--strip-all" cargo build
$ file target/debug/dummy
target/debug/dummy: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.0.0, stripped

Expected Behavior

--strip-all and --strip-debug should be distinct, so that symbols can be preserved without debug_info.

[alexrp]

#22591