compilers/rust: Add vs_crt support

As far as I can Tell, rust just handles this for us (it's always worked
with no special arguments from us). However, since we're going to add
support for base options for rust, we need to add the method.

mesonbuild/compilers/rust.py

@@ -52,6 +52,8 @@ class RustCompiler(Compiler):
                          linker=linker)
         self.exe_wrapper = exe_wrapper
         self.id = 'rustc'
+        if 'link' in self.linker.id:
+            self.base_options.append('b_vscrt')
 
     def needs_static_linker(self) -> bool:
         return False
@@ -141,3 +143,7 @@ class RustCompiler(Compiler):
         if std.value != 'none':
             args.append('--edition=' + std.value)
         return args
+
+    def get_crt_compile_args(self, crt_val: str, buildtype: str) -> T.List[str]:
+        # Rust handles this for us, we don't need to do anything
+        return []