[AArch64] Remove SVE XFAILs

[AArch64] Remove SVE XFAILs

These tests started passing after r257293, which had the side-effect
of renumbering the SSA names and leaving the COND_EXPRs in their
natural order.

This does show a deeper underlying issue that code generation is too
sensitive to internal things like SSA_NAME versions, but it no longer
affects these particular tests (for now).

2018-02-05  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/testsuite/
	* gcc.target/aarch64/sve/vcond_4.c: Remove XFAILs.
	* gcc.target/aarch64/sve/vcond_5.c: Likewise.

From-SVN: r257386