Fix clang formatting issue (llvm#69)

This patch fixes a clang-formatting issue introduced in a previous patch.

Author: boomanaiden154

gematria/datasets/convert_bhive_to_llvm_exegesis_input.cc

@@ -248,8 +248,8 @@ int main(int argc, char* argv[]) {
 
     // Check for errors.
     if (!proto.ok()) {
-      std::cerr << "Failed to disassemble block '" << hex << "': "
-                << proto.status() << "\n";
+      std::cerr << "Failed to disassemble block '" << hex
+                << "': " << proto.status() << "\n";
       continue;
     }