fixup issure about CMakeLists.txt

[yeahren]

if not,

[ 88%] Building C object platforms/asr-client/CMakeFiles/asrclient-app.dir/src/main.c.o /home/yeahren/study/unimrcp/platforms/asr-client/src/main.c:22:10: fatal error: asr_engine.h: No such file or directory

include "asr_engine.h"

      ^~~~~~~~~~~~~~

compilation terminated. platforms/asr-client/CMakeFiles/asrclient-app.dir/build.make:62: recipe for target 'platforms/asr-client/CMakeFiles/asrclient-app.dir/src/main.c.o' failed make[2]: [platforms/asr-client/CMakeFiles/asrclient-app.dir/src/main.c.o] Error 1 CMakeFiles/Makefile2:1236: recipe for target 'platforms/asr-client/CMakeFiles/asrclient-app.dir/all' failed make[1]: [platforms/asr-client/CMakeFiles/asrclient-app.dir/all] Error 2 Makefile:129: recipe for target 'all' failed make: *** [all] Error 2