Fix `make check-stage2` by fixing deps of exported syntax cfail tests.#14014

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pnkfelix wants to merge 2 commits intorust-lang:masterfrom

pnkfelix:fsk-make-cfail-full

Commits on May 7, 2014

Fix `make check-stage2` by fixing deps of exported syntax cfail tests.
pnkfelix
committed
Improve descriptions of `SREQ` and `CSREQ` to make difference clearer.
pnkfelix
committed