[CMake] Emit LLDB.framework.dSYM to avoid potential name collision with driver's lldb.dSYM
Emit framework's dSYM bundle as LLDB.framework.dSYM instead of LLDB.dSYM, because the latter could conflict with the driver's lldb.dSYM when emitted in the same directory on case-insensitive file systems.
Reviewers: friss, beanz, bogner
Subscribers: mgorny, lldb-commits, #lldb
Differential Revision: https://reviews.llvm.org/D60863