Rename NeedsSetToChangeDiffSize to HasAggressiveSymbolFolding which is a much
better name and matches what is used in the MachO writer.

llvm-svn: 122443
diff --git a/llvm/lib/MC/MCAsmInfo.cpp b/llvm/lib/MC/MCAsmInfo.cpp
index 1bc63d0..cc1afbd 100644
--- a/llvm/lib/MC/MCAsmInfo.cpp
+++ b/llvm/lib/MC/MCAsmInfo.cpp
@@ -54,7 +54,7 @@
   GPRel32Directive = 0;
   GlobalDirective = "\t.globl\t";
   HasSetDirective = true;
-  NeedsSetToChangeDiffSize = false;
+  HasAggressiveSymbolFolding = true;
   HasLCOMMDirective = false;
   COMMDirectiveAlignmentIsInBytes = true;
   HasDotTypeDotSizeDirective = true;