Upload pk8 key files for ClientCertStoreChromeOS unittest.

net/data/ssl/certificates/README

 This directory contains various certificates for use with SSL-related
 unit tests.
 
 - google.binary.p7b
 - google.chain.pem
 - google.pem_cert.p7b
 - google.pem_pkcs7.p7b
 - google.pkcs7.p7b
 - google.single.der
 - google.single.pem
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 - android-test-key-dsa-public.pem
 - android-test-key-ecdsa.pem
 - android-test-key-ecdsa-public.pem
      This is a set of test RSA/DSA/ECDSA keys used by the Android-specific
      unit test in net/android/keystore_unittest.c. They are used to verify
      that the OpenSSL-specific wrapper for platform PrivateKey objects
      works properly. See the generate-android-test-keys.sh script.
 
 - client_1.pem
 - client_1.key
+- client_1.pk8
 - client_1_ca.pem
 - client_2.pem
 - client_2.key
+- client_2.pk8
 - client_2_ca.pem
      This is a set of files used to unit test SSL client certificate
      authentication. These are generated by
      net/data/ssl/scripts/generate-client-certificates.sh
      - client_1_ca.pem and client_2_ca.pem are the certificates of
        two distinct signing CAs.
      - client_1.pem and client_1.key correspond to the certificate and
        private key for a first certificate signed by client_1_ca.pem.
      - client_2.pem and client_2.key correspond to the certificate and
        private key for a second certificate signed by client_2_ca.pem.
+     - each .pk8 file contains the same key as the corresponding .key file
+       as PKCS#8 PrivateKeyInfo in DER encoding.
 
 - eku-test-root.pem
 - non-crit-codeSigning-chain.pem
 - crit-codeSigning-chain.pem
      Two code-signing certificates (eKU: codeSigning; eKU: critical,
      codeSigning) which we use to test that clients are making sure that web
      server certs are checked for correct eKU fields (when an eKU field is
      present). Since codeSigning is not valid for web server auth, the checks
      should fail.
 
@@ skipping 60 matching lines @@
 
 - ct-test-embedded-cert.pem
 - ct-test-embedded-with-intermediate-chain.pem
 - ct-test-embedded-with-intermediate-preca-chain.pem
 - ct-test-embedded-with-preca-chain.pem
      Test certificate chains for Certificate Transparency: Each of these
      files contains a leaf certificate as the first certificate, which has
      embedded SCTs, followed by the issuer certificates chain.
      All files are from the src/test/testdada directory in
      https://code.google.com/p/certificate-transparency/