[ms-inline asm] Have the [ Symbol ] case fall into the more general logic. This is a follow on to r179393.  Test case to be added on the clang side. Part of rdar://13453209
[ms-inline asm] Have the [ Symbol ] case fall into the more general logic. This
is a follow on to r179393.  Test case to be added on the clang side.
Part of rdar://13453209


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@179399 91177308-0d34-0410-b5e6-96231b3b80d8

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