[TF-M] Adding tfm_mailbox_config.h to .gitignore

Hello everyone. After building the project interface/include/multi_core/tfm_mailbox_config.h is generated, but it is not in .gitignore I think this file should be in .gitignore because it is build artifact and is really annoying to deal with. Am I wrong somewhere?

Best regards, Bohdan Hunko

Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko@infineon.commailto:Bohdan.Hunko@infineon.com