[lldb][cmake] Remove dependency on libLLVMCoverage (NFCI)

[vsk]

Summary

This should also eliminate the libLLVMProfileData dependency, which cuts
down on the build time nicely.

This passes check-lldb.

This could lead to a functional change if lldb needs to compile *and*
instrument code, but I don't see this done anywhere and I can't imagine
a situation where this would be needed.

[clayborg]

I am fine with this as long as all the buildbots are happy. Watch the builders closely if you commit this.

cmake/LLDBDependencies.cmake

   mc
   mcjit
   core
   mcdisassembler
   executionengine
   runtimedyld
   option
   support
-  coverage
   )
 
 if ( NOT LLDB_DISABLE_PYTHON )
   set(LLDB_WRAP_PYTHON ${LLDB_BINARY_DIR}/scripts/LLDBWrapPython.cpp)
 
   set_source_files_properties(${LLDB_WRAP_PYTHON} PROPERTIES GENERATED 1)
   if (CLANG_CL)
     set_source_files_properties(${LLDB_WRAP_PYTHON} PROPERTIES COMPILE_FLAGS -Wno-unused-function)
   endif()
   if (LLVM_COMPILER_IS_GCC_COMPATIBLE AND
       NOT "${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     set_property(SOURCE ${LLDB_WRAP_PYTHON}
                  APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-sequence-point -Wno-cast-qual")
   endif ()
 endif()