Fix jump tables to match gcc (and the ABI and whatnot)

llvm-svn: 30594
diff --git a/llvm/lib/Target/Alpha/AlphaTargetAsmInfo.cpp b/llvm/lib/Target/Alpha/AlphaTargetAsmInfo.cpp
index fd77b87..ed8f6cb 100644
--- a/llvm/lib/Target/Alpha/AlphaTargetAsmInfo.cpp
+++ b/llvm/lib/Target/Alpha/AlphaTargetAsmInfo.cpp
@@ -18,4 +18,6 @@
 AlphaTargetAsmInfo::AlphaTargetAsmInfo(const AlphaTargetMachine &TM) {
   AlignmentIsInBytes = false;
   PrivateGlobalPrefix = "$";
+  JumpTableDirective = ".gprel32";
+  JumpTableTextSection = "\t.section .rodata\n";
 }