enable the "mem" feature of the compiler-builtins crate

japaric · japaric · commit 67003f069cfa · 2017-07-14T21:36:34.000-05:00
turns out it *is* required if your application ends up requiring a `memcmp`
operation.
diff --git a/Xargo.toml b/Xargo.toml
@@ -2,4 +2,5 @@
 stage = 0
 
 [dependencies.compiler_builtins]
+features = ["mem"]
 stage = 1
