mbedtls: add pkcs7 test data

This commit adds the static test data generated by
commands from Makefile.

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
diff --git a/tests/data_files/pkcs7-rsa-sha256-2.key b/tests/data_files/pkcs7-rsa-sha256-2.key
new file mode 100644
index 0000000..6226f8a
--- /dev/null
+++ b/tests/data_files/pkcs7-rsa-sha256-2.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----