X86 / Cygwin asm / alignment fixes.
Patch contributed by Anton Korobeynikov!

llvm-svn: 28480
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index 756b6b7..cafa09c 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -182,6 +182,6 @@
 #endif
   }
 
-  if (TargetType == isDarwin)
+  if (TargetType == isDarwin || TargetType == isCygwin)
     stackAlignment = 16;
 }