perf script: Finish the rename from trace to script

The scripts have calls to 'perf trace' that need to be converted to 'perf script', do it.

This problem was introduced in 133dc4c.

Reported-by: Torok Edwin <edwintorok@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Torok Edwin <edwintorok@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/scripts/perl/Perf-Trace-Util/README

@@ -1,7 +1,7 @@
 Perf-Trace-Util version 0.01
 ============================
 
-This module contains utility functions for use with perf trace.
+This module contains utility functions for use with perf script.
 
 Core.pm and Util.pm are pure Perl modules; Core.pm contains routines
 that the core perf support for Perl calls on and should always be
@@ -33,7 +33,7 @@ After you do that:
 
 INSTALLATION
 
-Building perf with perf trace Perl scripting should install this
+Building perf with perf script Perl scripting should install this
 module in the right place.
 
 You should make sure libperl and ExtUtils/Embed.pm are installed first