bazel: for the prolog compiler rule, don't use $TMP as temp dir.

The prolog compiler tries to be transactional by renaming a temp file to
its final destination. This only works if $TMP is on the same file
system as the final output.

Change-Id: I3b3d261d61ace2798fca96d849bce9f2bbd46bcd

lib/prolog/prolog.bzl

@@ -22,7 +22,7 @@ def prolog_cafe_library(
   genrule2(
     name = name + '__pl2j',
     cmd = '$(location //lib/prolog:compiler_bin) ' +
-      '$$TMP $@ ' +
+      '$$(dirname $@) $@ ' +
       '$(SRCS)',
     srcs = srcs,
     tools = ['//lib/prolog:compiler_bin'],