fixed a typo (unclosed bracket) that cause CMake to fail

Fixes #1280

Change-Id: I987c860052923602b0ce7e6837a6905ad81a9f22
fix CMake bug related to TestQPX.c location

cmake/TestQPX.c was not found because it lacked the
appropriate relative path.

Fixes #1281

Change-Id: I5fcc8598c91e39a86c337f14497b6d5faff91116