BUILD: Make AppVeyor spit out the CMake unit test logs

.appveyor.yml

@@ -139,7 +139,12 @@ build_script:
           -DICONV_INCLUDE_DIR=C:/projects/xoreos/libs/%LIBICONV%-lib/include -DICONV_LIBRARIES=C:/projects/xoreos/libs/%LIBICONV%-lib/lib/libiconv.lib
           -DSDL2_INCLUDE_DIR=%LIBSDL2_DESTDIR%/include/SDL2 -DSDL2_LIBRARY=%LIBSDL2_DESTDIR%/lib/SDL2.lib
           -DOPENAL_INCLUDE_DIR=%LIBOPENAL_DESTDIR%/include -DOPENAL_LIBRARY=%LIBOPENAL_DESTDIR%/lib/OpenAL32.lib
-  - cmake --build build --target check
+  - 'cmake --build build --target check & exit 0'
+  - dir build
+  - dir build\bin
+  - dir build\bin\Debug
+  - dir /w build\Testing\Temporary
+  - cat build/Testing/Temporary/*
 
 cache:
   - libs