[llvm-objdump] Don't print trailing space in dumpBytes

In disassembly output, dumpBytes prints a space, followed by a tab
printed by printInstr. Remove the extra space.

llvm-svn: 358045
diff --git a/llvm/lib/MC/MCInstPrinter.cpp b/llvm/lib/MC/MCInstPrinter.cpp
index ab8773e..159f407 100644
--- a/llvm/lib/MC/MCInstPrinter.cpp
+++ b/llvm/lib/MC/MCInstPrinter.cpp
@@ -21,10 +21,14 @@
 
 void llvm::dumpBytes(ArrayRef<uint8_t> bytes, raw_ostream &OS) {
   static const char hex_rep[] = "0123456789abcdef";
+  bool First = true;
   for (char i: bytes) {
+    if (First)
+      First = false;
+    else
+      OS << ' ';
     OS << hex_rep[(i & 0xF0) >> 4];
     OS << hex_rep[i & 0xF];
-    OS << ' ';
   }
 }