Use EC_KEY_new_by_curve_name.

May as well use this convenience function when we can. A little tidier. Even
fixes a leak on malloc failure in eckey_type2param.

Change-Id: Ie48dd98f2fe03fa9911bd78db4423ab9faefc63d
Reviewed-on: https://boringssl-review.googlesource.com/3772
Reviewed-by: Adam Langley <agl@google.com>
2 files changed