Dump more information about build times on Firefox

We could print out some more information about the time it takes to build each Firefox step to improve our build process.

marked this issue as related to rbm#40066

added 13.5 stable Build System Doing labels

assigned to @pierov

mentioned in merge request !874 (merged)

marked this issue as related to #41021 (closed)

marked this issue as related to #41022 (closed)

removed the relation with #41021 (closed)

removed the relation with #41022 (closed)

marked this issue as related to #41051 (closed)

marked this issue as related to #41052 (closed)

removed the relation with #41051 (closed)

marked this issue as related to #41021 (closed)

removed Doing label

closed