Update README.md for automating testing after installation.

README.md

@@ -65,6 +65,14 @@ In order to manually build and install HPVM, GNU Make can be run using the follo
 make -j<number of threads>
 make install
 ```
+
+In the end of the installation process, the installer automatically runs all the regression tests to ensure that the installation is
+successful. If HPVM is built and installed manually, the tests can be automatically run by executing the following step from the 
+current directory.
+```shell
+bash scripts/automate_tests.sh
+```
+
 With all the aforementioned steps, HPVM should be built, installed and ready for use.
 
 ## Benchmarks and Tests