test: check pkparse with compressed ec

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/data_files/ec_bp512_pub.comp.pem b/tests/data_files/ec_bp512_pub.comp.pem
new file mode 100644
index 0000000..c2fbdca
--- /dev/null
+++ b/tests/data_files/ec_bp512_pub.comp.pem
@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFowFAYHKoZIzj0CAQYJKyQDAwIIAQENA0IAAji37JK2HFxsf7wopOx1nUj81OLj
+dN79XElopU2+91EOUXiG+/w46jmqUpNZ1wpxVsNdPLrHzndr2yUd1kvOcSM=
+-----END PUBLIC KEY-----