build error in debug mode

[Thanh-Binh]

Hi all,
while Build in release mode runs perfectly, there is a bug by building in debug mode (do last step for unit testes).

make[2]: *** No rule to make target '/home/binh/nupic/htm2023/htm.core/build/ThirdParty/lib/libgtestd.a', needed by 'src/test/unit_tests'.  Stop.
make[2]: *** Waiting for unfinished jobs....
[ 98%] Building CXX object src/test/CMakeFiles/unit_tests.dir/__/examples/hello/HelloSPTP.cpp.o
make[1]: *** [CMakeFiles/Makefile2:422: src/test/CMakeFiles/unit_tests.dir/all] Error 2
make: *** [Makefile:156: all] Error 2

This bug is caused by using libgtestd.a, which is not built before from the ThirdParty libraries.
It is not a big problem, because we can easily solve it by copying libgtest.a to libgtestd.a instead of building an extra gtest-lib in Debug mode and run
make -j8 install
again.

It is fine if we modify CMakeList.txt for avoiding it.
Thanks