base: Add flash-kernel and mtd-tools to the dependency list

4 jobs for flash-kernel-deps in 3 minutes and 50 seconds
Status Name Job ID Coverage
  Build
passed build:deb #10488
librem5

00:01:36

passed build:docs #10487
librem5

00:01:58

 
  Test
passed test:download:deb #10489
librem5

00:01:22

passed test:download:pip #10490
librem5

00:01:51