Make the rust tests link.

config.rust.in

@@ -5,6 +5,7 @@
 
 BUILDDIR=@BUILDDIR@
 TOR_LDFLAGS_zlib=@TOR_LDFLAGS_zlib@
+TOR_LDFLAGS_nss=@TOR_LDFLAGS_nss@
 TOR_LDFLAGS_openssl=@TOR_LDFLAGS_openssl@
 TOR_LDFLAGS_libevent=@TOR_LDFLAGS_libevent@
 TOR_ZLIB_LIBS=@TOR_ZLIB_LIBS@
@@ -20,3 +21,4 @@ TOR_LZMA_LIBS=@TOR_LZMA_LIBS@
 TOR_ZSTD_LIBS=@TOR_ZSTD_LIBS@
 LIBS=@LIBS@
 LDFLAGS=@LDFLAGS@
+NSS_LIBS=@NSS_LIBS@

src/rust/build.rs

@@ -173,6 +173,7 @@ pub fn main() {
 
             cfg.from_cflags("TOR_ZLIB_LIBS");
             cfg.from_cflags("TOR_LIB_MATH");
+            cfg.from_cflags("NSS_LIBS");
             cfg.from_cflags("TOR_OPENSSL_LIBS");
             cfg.from_cflags("TOR_LIBEVENT_LIBS");
             cfg.from_cflags("TOR_LIB_WS32");