More NIST curves (#142)

Co-authored-by: Pratyush Mishra <pratyushmishra@berkeley.edu>

secp384r1/src/constraints/curves.rs

@@ -0,0 +1,10 @@
+use crate::{constraints::FqVar, *};
+use ark_r1cs_std::groups::curves::short_weierstrass::ProjectiveVar;
+
+/// A group element in the secp384r1 curve.
+pub type GVar = ProjectiveVar<Config, FqVar>;
+
+#[test]
+fn test() {
+    ark_curve_constraint_tests::curves::sw_test::<Config, GVar>().unwrap();
+}