README.md: update instruction to run tests

benma · benma · commit ce6d438266e0 · 2019-07-19T13:50:16.000+02:00
Reflecting what Travis does.
diff --git a/README.md b/README.md
@@ -59,5 +59,5 @@ libsecp256k1 is built using autotools:
     $ ./autogen.sh
     $ ./configure
     $ make
-    $ ./tests
+    $ make check
     $ sudo make install  # optional
