tools: Need search path for uninstalled modules too.

This fixes the perl compilation failures of fullPathName.pl
that occur before the src/tools directory has been built, and
ensures that the other tools that use EPICS modules also work.

src/tools/convertRelease.pl

@@ -17,7 +17,7 @@ eval 'exec perl -S $0 ${1+"$@"}'  # -*- Mode: perl -*-
 use strict;
 
 use FindBin qw($Bin);
-use lib "$Bin/../../lib/perl";
+use lib ("$Bin/../../lib/perl", $Bin);
 
 use Cwd qw(cwd abs_path);
 use Getopt::Std;

src/tools/expandVars.pl

@@ -12,7 +12,7 @@
 use strict;
 
 use FindBin qw($Bin);
-use lib "$Bin/../../lib/perl";
+use lib ("$Bin/../../lib/perl", $Bin);
 
 use EPICS::Getopts;
 use EPICS::Path;

src/tools/fullPathName.pl

@@ -16,7 +16,7 @@ eval 'exec perl -S -w  $0 ${1+"$@"}'  # -*- Mode: perl -*-
 use strict;
 
 use FindBin qw($Bin);
-use lib "$Bin/../../lib/perl";
+use lib ("$Bin/../../lib/perl", $Bin);
 
 use Getopt::Std;
 use EPICS::Path;