Libva-Utils fails to compile with GCC 7.1.1

[stripes416]

22:29:22,331 INFO  - test_va_api_init_terminate.cpp: In member function 'void VAAPI::VAAPIInitTerminate::doInitTerminate()':
22:29:22,331 INFO  - test_va_api_init_terminate.cpp:41:8: error: suggest explicit braces to avoid ambiguous 'else' [-Werror=dangling-else]
22:29:22,331 INFO  - if (vaDisplay)
22:29:22,331 INFO  - ^

[uartie]

This is a side-effect from the GTEST macros not enclosing the entire macro definition inside braces. We should only have to add braces in our if statement to fix this (e.g. if(...) { ... })

[uartie]

google/googletest#1119