Undefined reference to vaCopy

Building the latest libva-utils on yocto gives the following error. Request you to provide a solution.

```
/usr/lib64/gcc/x86_64-ese-linux/9.3.0/../../../../x86_64-ese-linux/bin/ld: vacopy.o: in function `main':
/home/root/hemanth/libva-utils/videoprocess/vacopy.cpp:544: undefined reference to `vaCopy'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:487: vacopy] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/home/root/hemanth/libva-utils/videoprocess'
make[1]: *** [Makefile:459: all-recursive] Error 1
make[1]: Leaving directory '/home/root/hemanth/libva-utils'
make: *** [Makefile:391: all] Error 2

```