[lldb] Fix hard-coded argument to set_target_properties

The call to `set_target_properties` should use the target passed to
`add_lldb_library` instead of a hard-coded value. Upstream `liblldb` is
the only target for which this matters, but downstream we have
LLDBRPC.framework which needs this as well.

lldb/cmake/modules/AddLLDB.cmake

@@ -105,7 +105,7 @@ function(add_lldb_library name)
   # this may result in the wrong install DESTINATION. The FRAMEWORK property
   # must be set earlier.
   if(PARAM_FRAMEWORK)
-    set_target_properties(liblldb PROPERTIES FRAMEWORK ON)
+    set_target_properties(${name} PROPERTIES FRAMEWORK ON)
   endif()
 
   if(PARAM_SHARED)