Fix spelling error in warning

Test: m -j32 -k
Bug: 36450628
Change-Id: I0f6463f3de3dcf45f396c7f406f8c1d6b79bf7f9
diff --git a/libbacktrace/Backtrace.cpp b/libbacktrace/Backtrace.cpp
index 4354f0b..3545661 100644
--- a/libbacktrace/Backtrace.cpp
+++ b/libbacktrace/Backtrace.cpp
@@ -155,7 +155,7 @@
   case BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST:
     return "Thread doesn't exist";
   case BACKTRACE_UNWIND_ERROR_THREAD_TIMEOUT:
-    return "Thread has not repsonded to signal in time";
+    return "Thread has not responded to signal in time";
   case BACKTRACE_UNWIND_ERROR_UNSUPPORTED_OPERATION:
     return "Attempt to use an unsupported feature";
   case BACKTRACE_UNWIND_ERROR_NO_CONTEXT: