[PATCH] [NVPTX] Do not emit .weak symbols for NVPTX

[David Majnemer]

================
Comment at: include/llvm/MC/MCAsmInfo.h:269
@@ +268,3 @@
+  /// symbol.  Defaults to NULL.
+  const char *WeakDirective;
+
----------------
Does it default to .weak?

http://reviews.llvm.org/D6455