arm64: rename guest_SP to guest_XSP so as to avoid a name clash with
guest_SP from s390 world. 


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13776 a5019735-40e9-0310-863c-91ae7b9d1cf9
Ignore testcase executable.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13777 a5019735-40e9-0310-863c-91ae7b9d1cf9
Fix typo.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13778 a5019735-40e9-0310-863c-91ae7b9d1cf9