Bugfix: add -P option in test script

Otherwise nginx's installation directory could not be specified.

Signed-off-by: paulyang <paulyang.inf@gmail.com>

Author: InfoHunter

tests/run-regression-tests-nginx.pl

@@ -52,7 +52,7 @@
 my $platform = "nginx";
 
 my %opt;
-getopts('A:E:D:C:T:H:a:p:dvh', \%opt);
+getopts('A:E:D:C:T:H:P:a:p:dvh', \%opt);
 
 if ($opt{d}) {
 	$Data::Dumper::Indent = 1;