Build the `Skeleton' target when building "all" targets

llvm-svn: 21455
diff --git a/llvm/configure b/llvm/configure
index 61f154d..e5fcc89 100755
--- a/llvm/configure
+++ b/llvm/configure
@@ -3042,7 +3042,7 @@
   enableval=all
 fi;
 case "$enableval" in
-  all) TARGETS_TO_BUILD="X86 SparcV8 SparcV9 PowerPC Alpha IA64" ;;
+  all) TARGETS_TO_BUILD="X86 SparcV8 SparcV9 PowerPC Alpha IA64 Skeleton" ;;
   host-only)
     case "$llvm_cv_target_arch" in
       x86)     TARGETS_TO_BUILD="X86" ;;