KEEP_SYMBOLS by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3813 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/Makefile b/tools/opt/Makefile
index 9a016df..9bebf15 100644
--- a/tools/opt/Makefile
+++ b/tools/opt/Makefile
@@ -8,5 +8,7 @@
            transformutils vmcore support
 TOOLLINKOPTS = -ldl $(ExportSymbols)
 
+KEEP_SYMBOLS = 1
+
 include $(LEVEL)/Makefile.common