This will fix issue where emulator is used doing:
COMMAND ${CMAKE_CROSSCOMPILING_EMULATOR} /path/to/prog arg1 arg2
Prior to this commit, it wasn't working because the following command
was used:
/bin/sh -c /path/to/prog arg1 arg2
It is automatically set in CMakeFindBinUtils.cmake using the value
of _CMAKE_TOOLCHAIN_PREFIX extracted from the compiler name within
CMakeDetermineCCompiler.cmake.
The CMake issue is #15448 - https://cmake.org/Bug/view.php?id=15448
