libbacktrace patch committed: Correct tipo in comment

[Ian Lance Taylor via Gcc-patches]

This patch suggested by Ondřej Čertík fixes a typpo in a comment.
Bootstrapped and ran libbacktrace tests on x86_64-pc-linux-gnu.
Committed to mainline.

Ian

* simple.c (simple_unwind): Correct comment spelling.

diff --git a/libbacktrace/simple.c b/libbacktrace/simple.c
index b9b971af95e..9ba660c871c 100644
--- a/libbacktrace/simple.c
+++ b/libbacktrace/simple.c
@@ -55,7 +55,7 @@ struct backtrace_simple_data
   int ret;
 };
 
-/* Unwind library callback routine.  This is passd to
+/* Unwind library callback routine.  This is passed to
    _Unwind_Backtrace.  */
 
 static _Unwind_Reason_Code