[libc] Resolve multi-line comment error (#117636)

gcc interprets a backslash '\\' as the last char before a new line as a
line continuation character, even in a comment context. This can produce
an "error: multi-line comment [-Werror=comment]".

This removes the line continuation so that the comment can compile with
gcc.

GitOrigin-RevId: 4c91662a519705c2d0b6e002214a3e307f09b373