gnu: Adjust latest perl modules to new 'modify-phases' syntax.

* gnu/packages/compression.scm (perl-compress-raw-zlib)[arguments]:
  Add missing quotes, as needed since commit f8503e2.
* gnu/packages/perl.scm (perl-ipc-run)[arguments]: Likewise.
* gnu/packages/xml.scm (perl-xml-sax)[arguments]: Likewise.

gnu/packages/compression.scm

@@ -385,7 +385,7 @@ (define-public perl-compress-raw-zlib
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (add-before
-                   configure configure-zlib
+                   'configure 'configure-zlib
                    (lambda* (#:key inputs #:allow-other-keys)
                      (call-with-output-file "config.in"
                        (lambda (port)

gnu/packages/perl.scm

@@ -2486,7 +2486,7 @@ (define-public perl-ipc-run
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (add-before
-                   check disable-w32-test
+                   'check 'disable-w32-test
                    (lambda _
                      ;; This test fails, and we're not really interested in
                      ;; it, so disable it.

gnu/packages/xml.scm

@@ -245,7 +245,7 @@ (define-public perl-xml-sax
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (add-before
-                   install augment-path
+                   'install 'augment-path
                    ;; The install target tries to load the newly-installed
                    ;; XML::SAX module, but can't find it, so we need to tell
                    ;; perl where to look.