bootstrap: Add LLVM target matching for M68k

config.toml.example

@@ -103,7 +103,7 @@ changelog-seen = 2
 # the same format as above, but since these targets are experimental, they are
 # not built by default and the experimental Rust compilation targets that depend
 # on them will not work unless the user opts in to building them.
-#experimental-targets = "AVR"
+#experimental-targets = "AVR;M68k"
 
 # Cap the number of parallel linker invocations when compiling LLVM.
 # This can be useful when building LLVM with debug info, which significantly

src/bootstrap/native.rs

@@ -165,7 +165,7 @@ impl Step for Llvm {
 
         let llvm_exp_targets = match builder.config.llvm_experimental_targets {
             Some(ref s) => s,
-            None => "AVR",
+            None => "AVR;M68k",
         };
 
         let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };