ohos-libsec: Add Copyright and License for reuse compliance

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-acts/recipes-ohos-libsec/ohos-libsec/ohos-libsec_git.bb

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 LICENSE = "MulanPSL-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=2ba4788337b3607f139c2267ed50d32b"