Fix a bug of -C in bcc command.

Value for triple option (-C) should be in the arg[1] instead of
arg[0].

Change-Id: I0e35ec757cd8e247daf0b42389e879ee2857b25b
diff --git a/tools/bcc/main.cpp b/tools/bcc/main.cpp
index d963929..feb9b46 100644
--- a/tools/bcc/main.cpp
+++ b/tools/bcc/main.cpp
@@ -318,7 +318,7 @@
  */
 #if defined(__HOST__)
 static int optSetTriple(int, char **arg) {
-  TARGET_TRIPLE_STRING = arg[0];
+  TARGET_TRIPLE_STRING = arg[1];
   return 1;
 }
 #endif