generate: fix handling of permitted caps drop
generate: fix handling of permitted caps drop

Signed-off-by: Antonio Murdaca <f9809039ea4850e75dcb8d80b778844aa463358f@redhat.com>

wking/ocitools-v2,opencontainers/ocitools,wking/ocitools-v2,opencontainers/runtime-tools,opencontainers/ocitools,opencontainers/runtime-tools,liangchenye/ocitools,liangchenye/ocitools