perf trace/scripting: Add Fedora libperl install note to doc

Fedora needs perl-ExtUtils-Embed for Perl scripting, which also
brings along libperl-devel; note this info for the convenience
of Fedora users.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: anton@samba.org
Cc: hch@infradead.org
LKML-Reference: <1259565529-6407-5-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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

@@ -36,8 +36,8 @@ INSTALLATION
 Building perf with perf trace Perl scripting should install this
 module in the right place.
 
-You should make sure libperl is installed first e.g. apt-get install
-libperl-dev.
+You should make sure libperl and ExtUtils/Embed.pm are installed first
+e.g. apt-get install libperl-dev or yum install perl-ExtUtils-Embed.
 
 DEPENDENCIES
 

tools/perf/util/trace-event-perl.c

@@ -577,7 +577,9 @@ struct scripting_ops perl_scripting_ops = {
 void setup_perl_scripting(void)
 {
 	fprintf(stderr, "Perl scripting not supported."
-		"  Install libperl-dev[el] and rebuild perf to get it.\n");
+		"  Install libperl and rebuild perf to enable it.  e.g. "
+		"apt-get install libperl-dev (ubuntu), yum install "
+		"perl-ExtUtils-Embed (Fedora), etc.\n");
 }
 #else
 void setup_perl_scripting(void)