Add .rej and .orig patch files to .gitignore

[vivien-apple]

Problem

When applying a patch the old style way with 'patch -p1 < patch_file.patch there could be .rej(ected) file and .orig(inal) files lurking into the repo.

[chip-bot]

Size increase report for "Build Examples [nRF]"

File	Section	File	VM

Full report output

Bloat report for job 'Build Examples [nRF]'

Files found only in the baseline:
    bloat_report.txt

Comparing master_binaries/nrf-build/chip-nrf52840-lock-example.out and example_binaries/nrf-build/chip-nrf52840-lock-example.out:

sections,vmsize,filesize

[chip-bot]

Size increase report for "Build Examples [ESP32]"

File	Section	File	VM
chip-wifi-echo.elf	.dram0.bss	0	-8
chip-wifi-echo.elf	.flash.rodata	-8	-8
chip-wifi-echo.elf	.flash.text	-40	-40

Full report output

Bloat report for job 'Build Examples [ESP32]'

Files found only in the baseline:
    bloat_report.txt

Comparing master_binaries/esp32-build/chip-wifi-echo.elf and example_binaries/esp32-build/chip-wifi-echo.elf:

sections,vmsize,filesize
[Unmapped],0,8
.dram0.bss,-8,0
.flash.rodata,-8,-8
.flash.text,-40,-40

[chip-bot]

Size increase report for "Build Examples [main-build]"

File	Section	File	VM

Full report output

Bloat report for job 'Build Examples [main-build]'

Files found only in the baseline:
    bloat_report.txt

Comparing master_binaries/main-build/chip-standalone-demo.out and example_binaries/main-build/chip-standalone-demo.out:

sections,vmsize,filesize