Rust

Add support for DW_LNCT_LLVM_source #478

Job	Run time
msrv	1m 40s
msrv-read	1m 46s
bench	1m 11s
Build fuzz targets	1m 26s
build (ubuntu-latest, stable)	52s
features	2m 50s
build (ubuntu-latest, beta)	51s
coverage	1m 12s
build (ubuntu-latest, nightly)	47s
cross (i686-unknown-linux-gnu)	44s
build (stable, macOS-latest)	58s
cross (powerpc64-unknown-linux-gnu)	51s
doc	30s
rustfmt	20s
Run `debug_abbrev` fuzz target	5m 6s
Run `debug_aranges` fuzz target	5m 5s
Run `debug_info` fuzz target	5m 14s
Run `debug_line` fuzz target	5m 7s
Run `eh_frame` fuzz target	5m 7s
Run `eh_frame_hdr` fuzz target	5m 13s
	46m 50s

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