Skip TestDisassembleRawData when remote

Summary:
As this test will create a new target, it will cause all following tests
to fail when running in platform mode, if the new target does not match
the existing architecture (for example, x86 vs x86_64).

Reviewers: zturner, spyffe, clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D21906

llvm-svn: 274364