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6a96e7a255
Clean up `library/profiler_builtins/build.rs` This PR makes a series of improvements to the long-neglected build script for `profiler_builtins`. Most notably: - The logic that silently skips missing source files has been removed, since it is currently unnecessary and makes build errors more confusing. - The script now emits `cargo::rerun-if-changed` directives for the `compiler-rt` source and include directories. Compiler behaviour and user programs should be unaffected by these changes.