package/python-scp: fix dependency

Buildroot commit 3963c3c06e3a4161e0ebb570db80ab0b297c9a6a added this
package which selects python-paramiko but forgot to add its dependency.

Fixes warning:

WARNING: unmet direct dependencies detected for BR2_PACKAGE_PYTHON_PARAMIKO
  Depends on [n]: BR2_PACKAGE_PYTHON3 [=y] && BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS [=n]
  Selected by [y]:
  - BR2_PACKAGE_PYTHON_SCP [=y] && BR2_PACKAGE_PYTHON3 [=y]

seen with https://autobuild.buildroot.net/results/423/4235283218bc49f53bf7cafd4a67f380dba659c0/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-scp/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_PYTHON_SCP
 	bool "python-scp"
+	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS # python-paramiko -> python-cryptography, python-bcrypt
 	select BR2_PACKAGE_PYTHON_PARAMIKO # runtime
 	help
 	  scp module for paramiko.