fix(build): skip memory mapping on doc builds

There are no binaries to analyse in documentation builds. Skip this step
so we don't pollute the logs with obvious errors e.g. `FileNotFoundError`.

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: Ib0eaf6bb2f4ebab89a2c4a7fa7242fa00be5e0cc
1 file changed