Make phi() and integralPhi() static and public
Make phi() and integralPhi() static and public

Needed for the NORMDIST() OpenCL implementation test doc.

Change-Id: I40f0d5d7ccf5963fa47d6648873ab23f8adf7aea

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core