[PowerPC] Fix "info vector" test in gdb.arch/altivec-regs.exp

This patch fixes one of the tests in gdb.arch/altivec-regs.exp that
was passing an incorrect list to gdb_expect_list, which always
matched.

gdb/testsuite/ChangeLog:
2019-01-14  Pedro Franco de Carvalho  <pedromfc@linux.ibm.com>

	* gdb.arch/altivec-regs.exp: Fix the list passed to
	gdb_expect_list when testing "info vector".
2 files changed