[Sound-open-firmware] SOF build problem

[Pierre-Louis Bossart]

> checking build system type... x86_64-pc-linux-gnu
> checking host system type... x86_64-pc-linux-gnu
> ./configure: line 3340: syntax error near unexpected token `cmocka,'
> ./configure: line 3340: `			PKG_CHECK_EXISTS(cmock
> a,'
Very likely due to the unit tests based on cmocka...