Finish .cexp -> .x conversion.

From-SVN: r17462

diff --git a/gcc/testsuite/gcc.failure/940409-1.cexp b/gcc/testsuite/gcc.failure/940409-1.x
similarity index 100%
rename from gcc/testsuite/gcc.failure/940409-1.cexp
rename to gcc/testsuite/gcc.failure/940409-1.x