Search for llvm-symbolizer binary in the same directory as argv[0], before

looking for it along $PATH. This allows installs of LLVM tools outside of
$PATH to find the symbolizer and produce pretty backtraces if they crash.

llvm-svn: 272232

llvm/tools/llvm-objdump/llvm-objdump.cpp

@@ -1736,7 +1736,7 @@ static void DumpInput(StringRef file) {
 
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
-  sys::PrintStackTraceOnErrorSignal();
+  sys::PrintStackTraceOnErrorSignal(argv[0]);
   PrettyStackTraceProgram X(argc, argv);
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.