Merge r98193 from mainline.

add DESTDIR support for TOOLALIAS, for PR6557, patch by
Matthias Klose!

llvm-svn: 98303

Author: tlattner

llvm/Makefile.rules

@@ -1329,7 +1329,7 @@ uninstall-local::
 
 # TOOLALIAS install.
 ifdef TOOLALIAS
-DestToolAlias = $(PROJ_bindir)/$(TOOLALIAS)$(EXEEXT)
+DestToolAlias = $(DESTDIR)$(PROJ_bindir)/$(TOOLALIAS)$(EXEEXT)
 
 install-local:: $(DestToolAlias)