gnu: gamin: Fix cross-compilation to riscv64.

* gnu/packages/gnome.scm (gamin)
[arguments]<#:phases>: Apply 'replace-config.sub for riscv64 too.
[native-inputs]: Add config for riscv64 too.

Signed-off-by: 宋文武 <iyzsong@member.fsf.org>

gnu/packages/gnome.scm

@@ -12266,7 +12266,7 @@ (define-public gamin
      `(#:phases
        (modify-phases %standard-phases
          ;; The 'config.sub' is too old to recognise aarch64.
-         ,@(if (and=> (%current-target-system) target-aarch64?)
+         ,@(if (or (target-aarch64?) (target-riscv64?))
                `((add-after 'unpack 'replace-config.sub
                    (lambda _
                      (delete-file "config.sub")
@@ -12308,7 +12308,7 @@ (define in-abstract-sockets-test? #f)
      (list glib))
     (native-inputs
      `(("pkg-config" ,pkg-config)
-       ,@(if (and=> (%current-target-system) target-aarch64?)
+       ,@(if (or (target-aarch64?) (target-riscv64?))
              `(("config" ,config))
              '())))
     (home-page "https://people.gnome.org/~veillard/gamin/")