improve location of private_libdir in julia-config.jl

Author: JeffBezanson

base/Makefile

@@ -62,6 +62,7 @@ endif
 	@echo "const DATAROOTDIR = \"$(datarootdir_rel)\"" >> $@
 	@echo "const DOCDIR = \"$(docdir_rel)\"" >> $@
 	@echo "const LIBDIR = \"$(libdir_rel)\"" >> $@
+	@echo "const PRIVATE_LIBDIR = \"$(private_libdir_rel)\"" >> $@
 	@echo "const LIBEXECDIR = \"$(libexecdir_rel)\"" >> $@
 	@echo "const INCLUDEDIR = \"$(includedir_rel)\"" >> $@
 

contrib/julia-config.jl

@@ -23,7 +23,7 @@ function libDir()
     end
 end
 
-private_libDir() = joinpath(libDir(), "julia")
+private_libDir() = joinpath(JULIA_HOME, Base.PRIVATE_LIBDIR)
 
 function includeDir()
     joinpath(match(r"(.*)(bin)",JULIA_HOME).captures[1],"include","julia")