Revert "[clang-tidy] Refactor the code and add a close-on-exec check on...

Revert "[clang-tidy] Refactor the code and add a close-on-exec check on memfd_create() in Android module."

This reverts commit r310630.

The new code broke on Windows and was untested. On Linux, it was
selecting the "int" overload of operator<<, which definitely does not
print the right thing when fed a "Mode" char.

llvm-svn: 310661