temporarily add back this option, I will remove it in a couple days


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28675 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-config/llvm-config.in.in b/tools/llvm-config/llvm-config.in.in
index c799983..930d25e 100644
--- a/tools/llvm-config/llvm-config.in.in
+++ b/tools/llvm-config/llvm-config.in.in
@@ -95,6 +95,8 @@
     if ($arg =~ /^-/) {
         if ($arg eq "--version") {
             $has_opt = 1; print "$VERSION\n";
+        } elsif ($arg eq "--use-current-dir-as-prefix") {
+           # NOOP, remove!
         } elsif ($arg eq "--prefix") {
             $has_opt = 1; print "$PREFIX\n";
         } elsif ($arg eq "--bindir") {