gnu: icecat: Add more configure flags and rename a phase.

* gnu/packages/gnuzilla.scm (icecat)[arguments]: To configure-flags, add
"--with-distribution-id=org.gnu", "--disable-tests", "--disable-updater",
"--disable-crashreporter", "--disable-maintenance-service", and
"--disable-eme".  Rename the
'arrange-to-link-libxul-with-libraries-it-might-dlopen' phase to
'link-libxul-with-libraries'.

gnu/packages/gnuzilla.scm

@@ -558,10 +558,18 @@ security standards.")
        #:validate-runpath? #f
 
        #:configure-flags '("--enable-default-toolkit=cairo-gtk3"
+
+                           "--with-distribution-id=org.gnu"
+
                            "--enable-gio"
                            "--enable-startup-notification"
                            "--enable-pulseaudio"
 
+                           "--disable-tests"
+                           "--disable-updater"
+                           "--disable-crashreporter"
+                           "--disable-maintenance-service"
+                           "--disable-eme"
                            "--disable-gconf"
                            "--disable-gnomeui"
 
@@ -634,7 +642,7 @@ security standards.")
               (close-port out))
             #t))
          (add-after
-          'unpack 'arrange-to-link-libxul-with-libraries-it-might-dlopen
+          'unpack 'link-libxul-with-libraries
           (lambda _
             ;; libxul.so dynamically opens libraries, so here we explicitly
             ;; link them into libxul.so instead.