[rust/coverage] Pass -z,nostart-stop-gc to the linker am: 1799f9d7

		flags.RustFlags = append(flags.RustFlags,

			"-Z instrument-coverage", "-g")

		flags.LinkFlags = append(flags.LinkFlags,

			profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open")

			profileInstrFlag, "-g", coverage.OutputFile().Path().String(), "-Wl,--wrap,open",

			// Upstream LLVM change 6d2d3bd0a6 made

			// -z,start-stop-gc the default.  It drops metadata

			// sections like __llvm_prf_data unless they are marked

			// SHF_GNU_RETAIN.  https://reviews.llvm.org/D97448

			// marks generated sections, including __llvm_prf_data

			// as SHF_GNU_RETAIN.  However this change is not in

			// the Rust toolchain.  Since we link Rust libs with

			// new lld, we should use nostart-stop-gc until the

			// Rust toolchain updates past D97448.

			"-Wl,-z,nostart-stop-gc",

		)

		deps.StaticLibs = append(deps.StaticLibs, coverage.OutputFile().Path())

	}