Remove spurious trailing backslash in prefer_rlib docstring

	// This is primarily meant for rust_binary and rust_ffi modules where the default

	// linkage of libstd might need to be overridden in some use cases. This should

	// generally be avoided with other module types since it may cause collisions at

	// linkage if all dependencies of the root binary module do not link against libstd\

	// linkage if all dependencies of the root binary module do not link against libstd

	// the same way.

	Prefer_rlib *bool `android:"arch_variant"`