Fix nightly regression by manually passing --gc-sections
          #168
        
          
      
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Rust used to pass
--gc-sectionautomatically. In rust-lang/rust#85274, this behavior was changed to only pass that flag for targets that use a GNU linker. So we have to add it manually, otherwise the bootloader grows too large to be loaded by our assembly stage.Fixes #167
This is a hotfix for the
v0.9.17release and does not apply to themainbranch (which needs some additional fixes).