sanitizer support

src/rustc/std_shim/Cargo.toml

@@ -35,8 +35,12 @@ core = { path = "../../libcore" }
 
 # Reexport features from std
 [features]
+asan = ["std/asan"]
 backtrace = ["std/backtrace"]
 debug-jemalloc = ["std/debug-jemalloc"]
 jemalloc = ["std/jemalloc"]
 force_alloc_system = ["std/force_alloc_system"]
+lsan = ["std/lsan"]
+msan = ["std/msan"]
 panic-unwind = ["std/panic-unwind"]
+tsan = ["std/tsan"]