Create memcheck/tests/x86-linux/ and move some platform-specific tests (the
scalar* ones) into it.  Partial merge from DARWIN branch, r8943.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8974 a5019735-40e9-0310-863c-91ae7b9d1cf9
25 files changed