Fix test pubkey files. (#4826)

These files are in PEM, so name them as such. Also, they had extra DER
concatenated at the end; remove it.

test/entrypoint.sh

@@ -48,8 +48,8 @@ if [ -n "${PKCS11_PROXY_SOCKET:-}" ]; then
   }
   addobj --id 333333 --token-label intermediate --type privkey --write-object test/test-ca.key.der --label intermediate_key
   addobj --id 777777 --token-label root         --type privkey --write-object test/test-root.key.der --label root_key
-  addobj --id 333333 --token-label intermediate --type pubkey  --write-object test/test-ca.pubkey.der --label intermediate_key
-  addobj --id 777777 --token-label root         --type pubkey  --write-object test/test-root.pubkey.der --label root_key
+  addobj --id 333333 --token-label intermediate --type pubkey  --write-object test/test-ca.pubkey.pem --label intermediate_key
+  addobj --id 777777 --token-label root         --type pubkey  --write-object test/test-root.pubkey.pem --label root_key
 fi
 
 if [[ $# -eq 0 ]]; then

test/test-ca.pubkey.pem

@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwgpHeZoFxRKydxdjNBPX
+cPk2v5neYvEwyHdNR23qwAKapsnRu1GWBd8y00szY5TUjprcm760hlJ2fa/bUkHC
+/FTOllDjPLZyKYiIxANkJAcnDML0ZmfwdpbT3WLP0fQajcDtYNfBg2ax0s1GLTSj
+XhSOhpWpo+xitla9EpohGppTSEeZLQBbBBK83/3eIwhe7KLDLCaTAptaefEJD+Cx
+y0oVS1w2vATH1aCPoqWHANPIjVBZIFvFVg3JSA8XMrGtKbAw7TI19/uGj5BP3Hn5
+j/tcTn1LgxzhlfFxcp7D+BKU31Tma9P4PYGEO2QK6l1+xk0JBanbsD5v8OasUj02
+qwIDAQAB
+-----END PUBLIC KEY-----

test/test-root.pubkey.pem

@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA+TbvalHXQYO6GhJUJZI5
+mF2k4+nZDIvqWyrjw+2k9+UAcekuLKPpSclu9aBRvUggw3XFHAW95qW6Dv2+5gvi
+nUmTq9Ry7kVTUYAxyZu1ydHt+wDETmFJfeY6/fpBHHIsuGLItqpUGmr8D6LROGEq
+fFY2B9+08O7Zs+FufDRgLHWEvLTdpPkrzeDJs9Oo6g38jfT9b4+9Ahs+FvvwqneA
+kbeZgBC2NWKB+drMuNBTPbF/W1a8czAzHeOs6qy0dBlTHNjL62/o9cRKNiKe3Iqw
+HJdd01V1aLSUgIbe2HrP9EC1djnUXWR3jx3ursaKt7PTKsC52UJkRqnai80MzQj0
+WwIDAQAB
+-----END PUBLIC KEY-----