Add GlobalSign ECC R4 root (for GCP)

Fixes mongoose-os-libs/gcp#6
Fixes #3

CL: Add GlobalSign ECC R4 root (for GCP)

Author: rojer

fs/ca.pem

@@ -472,3 +472,20 @@ PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls
 YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk
 CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
 -----END CERTIFICATE-----
+
+Not Before: Nov 13 00:00:00 2012 GMT
+Not After : Jan 19 03:14:07 2038 GMT
+Subject: OU = GlobalSign ECC Root CA - R4, O = GlobalSign, CN = GlobalSign
+-----BEGIN CERTIFICATE-----
+MIIB4TCCAYegAwIBAgIRKjikHJYKBN5CsiilC+g0mAIwCgYIKoZIzj0EAwIwUDEk
+MCIGA1UECxMbR2xvYmFsU2lnbiBFQ0MgUm9vdCBDQSAtIFI0MRMwEQYDVQQKEwpH
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+DgYDVR0PAQH/BAQDAgEGMA8GA1UdEwEB/wQFMAMBAf8wHQYDVR0OBBYEFFSwe61F
+uOJAf/sKbvu+M8k8o4TVMAoGCCqGSM49BAMCA0gAMEUCIQDckqGgE6bPA7DmxCGX
+kPoUVy0D7O48027KqGx2vKLeuwIgJ6iFJzWbVsaj8kfSt24bAgAXqmemFZHe+pTs
+ewv4n4Q=
+-----END CERTIFICATE-----