Simplify MCFillFragment.

The value size was always 1 or 0, so we don't need to store it.

In a no asserts build this takes the testcase of pr26208 from 11 to 10
seconds.

llvm-svn: 258141
diff --git a/llvm/lib/MC/MCMachOStreamer.cpp b/llvm/lib/MC/MCMachOStreamer.cpp
index 21f7571..578ae96 100644
--- a/llvm/lib/MC/MCMachOStreamer.cpp
+++ b/llvm/lib/MC/MCMachOStreamer.cpp
@@ -414,7 +414,7 @@
   if (ByteAlignment != 1)
     new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, Section);
 
-  MCFragment *F = new MCFillFragment(0, 0, Size, Section);
+  MCFragment *F = new MCFillFragment(0, Size, Section);
   Symbol->setFragment(F);
 
   // Update the maximum alignment on the zero fill section if necessary.