resolve shared library issue

Author: warsier

Makefile

@@ -34,6 +34,9 @@ nvml:
 nvml-clean:
 	cd nvml && ./clean.sh
 
+nvml-install:
+	cd nvml && make install
+
 nvml-example:
 	cd nvml/src/examples/libpmemobj/ && make
 

README.md

@@ -118,7 +118,12 @@ To clean, run:
 $ make nvml-clean
 ```
 
-Or you can also directly use the original scripts they provided under `pmtest/nvml/`. For more information, please refer to `pmtest/nvml/README.md`.
+For convenience, you may want to install the shared libraries, run:
+```
+$ sudo make nvml-install
+```
+
+Or you can also directly use the original scripts and Makefile they provided under `pmtest/nvml/`. For more information, please refer to `pmtest/nvml/README.md`.
 
 ## Testing and reproducing bugs
 To compile the examples, run: