Build rust-analyzer with --target for install/pgo xtask
#20804
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--target for install/pgo xtask
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The pgo xtask expects to find the recently-compiled version of rust-analyzer at
/target/$target/release/rust-analyzer, but theinstallxtask builds it without the--target $targetflag, thus placing it at/target/release/rust-analyzer.This PR adds the
--target $targetargument to the compilation of rust-analyzer in theinstallxtask so it works as expected.It also checks to make sure pgo actually generates files, and fails with a more actionable error (instead of the previous misleading
Do you have the rustup llvm-tools component installed?suggestion) when no files are generated.