* libc/machine/aarch64/strncmp.S: Correct arithmetic for argument N values close to the maximum representable value in an unsigned 64 bit value.
* libc/machine/aarch64/Makefile.am (lib_a_SOURCES): Re-ordered. Add strncmp.S and strncmp-stub.c. * libc/machine/aarch64/Makefile.in: Regenerated. * libc/machine/aarch64/strncmp-stub.c: New file. * libc/machine/aarch64/strncmp.S: New file.