cperl-mode: Indentation of ')' follows customisation

cperl-mode: Indentation of ')' follows customisation

* lisp/progmodes/cperl-mode.el (cperl-style-alist): Add
cperl-close-paren-offset to the settings for PBP style.

* test/lisp/progmodes/cperl-mode-tests.el (cperl-bug19709):
New test to verify correct indentation of closing parentheses (Bug#19709).

* test/lisp/progmodes/cperl-mode-resources/cperl-bug-19709.pl:
New test case with code from the bug report.

* test/lisp/progmodes/cperl-mode-resources/cperl-indent-styles.pl:
Add a new test clause for cperl-close-paren-offset.