[llvm-symbolizer][doc] Reorder --relativenames in options list

[jhenderson]

Summary

This puts it in alphabetical order, matching the rest of the list.

[jhenderson]

Ping?

llvm/docs/CommandGuide/llvm-symbolizer.rst

.. option:: --adjust-vma <offset>
   Add the specified offset to object file addresses when performing lookups.
   This can be used to perform lookups as if the object were relocated by the
   offset.
 
 .. option:: --basenames, -s
 
   Print just the file's name without any directories, instead of the
   absolute path.
   
-.. option:: --relativenames
-
-  Print the file's path relative to the compilation directory, instead
-  of the absolute path. If the command-line to the compiler included
-  the full path, this will be the same as the default.
-  
 .. _llvm-symbolizer-opt-C:
 
 .. option:: --demangle, -C
 
   Print demangled function names, if the names are mangled (e.g. the mangled
   name `_Z3bazv` becomes `baz()`, whilst the non-mangled name `foz` is printed
   as is). Defaults to true.
 
.. code-block:: console
 
     $ llvm-symbolizer --obj=test.elf 0x400490 --print-source-context-lines=2
     baz()
     /tmp/test.cpp:11:0
     10  :   volatile int k = 42;
     11 >:   return foz() + k;
     12  : }
 
+.. option:: --relativenames
+
+  Print the file's path relative to the compilation directory, instead
+  of the absolute path. If the command-line to the compiler included
+  the full path, this will be the same as the default.
+
 .. _llvm-symbolizer-opt-use-symbol-table:
 
 .. option:: --use-symbol-table
 
   Prefer function names stored in symbol table to function names in debug info
   sections. Defaults to true.
 
 .. option:: --verbose