Don't install libLTO.dylib by default.

llvm-svn: 109460
diff --git a/llvm-gcc-4.2/GNUmakefile b/llvm-gcc-4.2/GNUmakefile
index 955dfd5..89dcb10 100644
--- a/llvm-gcc-4.2/GNUmakefile
+++ b/llvm-gcc-4.2/GNUmakefile
@@ -90,7 +90,7 @@
 	        SYMROOT=$(OBJROOT)/sym-llvmCore \
 	        DSTROOT=$(OBJROOT)/dst-llvmCore llvmCore
 	$(MAKE) LLVMCORE_PATH=$(OBJROOT)/dst-llvmCore/Developer/usr/local \
-	        INSTALL_LIBLTO=yes llvmgcc42
+	        INSTALL_LIBLTO=no llvmgcc42
 
 llvmCore: $(OBJROOT) $(SYMROOT) $(DSTROOT)
 	if [ ! -d $(SRC)/llvmCore ]; then \