process: use rest parameters in nextTick.

This increases the performance of stream/writeable-manywrites.js both with Crankshaft and with Turbofan significantly.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

process