lit/LitConfig.py: Add the new method getToolsPath(dir,paths,tools).
lit/LitConfig.py: Add the new method getToolsPath(dir,paths,tools).

It seeks tools(eg. [cmp, grep, sed]) in same directory, to be sane.

It seeks "bash" only in the directory found at last time. Or bash would be insane (against other tools).

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@125175 91177308-0d34-0410-b5e6-96231b3b80d8

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