Fix command-line profiling with ruby-prof

ruby-prof v1.0 changed the interface of `RubyProf::AbstractPrinter` from
`method_name` to `method_location`.

This fixes an unknown method error when using
`Gitlab::Profiler.print_by_total_time` as documented in
https://docs.gitlab.com/ee/development/profiling.html.

lib/gitlab/profiler/total_time_flat_printer.rb

@@ -24,7 +24,7 @@ module Gitlab
 
           sum += method.self_time
 
-          @output << "%6.2f  %9.3f %9.3f %9.3f %9.3f %8d  %s%s\n" % [
+          @output << "%6.2f  %9.3f %9.3f %9.3f %9.3f %8d  %s%-30s %s\n" % [
             method.self_time / total_time * 100, # %self
             method.total_time,                   # total
             method.self_time,                    # self
@@ -32,7 +32,8 @@ module Gitlab
             method.children_time,                # children
             method.called,                       # calls
             method.recursive? ? "*" : " ",       # cycle
-            method_name(method)                  # name
+            method.full_name,                    # method_name
+            method_location(method)              # location
           ]
         end
       end