Use universal LIBUV_INC instead of build_includedir

base/Makefile

@@ -42,7 +42,7 @@ $(BUILDDIR)/errno_h.jl:
 $(BUILDDIR)/file_constants.jl: $(SRCDIR)/../src/file_constants.h
 	@$(call PRINT_PERL, $(CPP_STDOUT) -DJULIA $< | perl -nle 'print "$$1 0o$$2" if /^(\s*const\s+[A-z_]+\s+=)\s+(0[0-9]*)\s*$$/; print "$$1" if /^\s*(const\s+[A-z_]+\s+=\s+([1-9]|0x)[0-9A-z]*)\s*$$/' > $@)
 
-$(BUILDDIR)/uv_constants.jl: $(SRCDIR)/../src/uv_constants.h $(build_includedir)/uv/errno.h
+$(BUILDDIR)/uv_constants.jl: $(SRCDIR)/../src/uv_constants.h $(LIBUV_INC)/uv/errno.h
 	@$(call PRINT_PERL, $(CPP_STDOUT) "-I$(LIBUV_INC)" -DJULIA $< | tail -n 16 > $@)
 
 $(BUILDDIR)/build_h.jl.phony: