Add CMake's TryRunResults.cmake

This file is generated when cmake is in cross-compilation mode and
try_run or check_source_runs are used in CMake code without setting
cache variables before so the user is aware what needs to be adjusted
for the target system.

https://cmake.org/cmake/help/latest/variable/CMAKE_CROSSCOMPILING_EMULATOR.html

CMake.gitignore

@@ -10,3 +10,4 @@ compile_commands.json
 CTestTestfile.cmake
 _deps
 CMakeUserPresets.json
+TryRunResults.cmake