This commit reduces the input that tr and sed need to consider to a few lines and so makes the extraction of ksyms faster. On my machine at least, builds are greatly slowed down by tr. A single invocation of sed might be fast too but seems non-trivial. Bug: 174773617 Change-Id: I98698ff8603d816c55d4922ccb5936364b5fd906 Signed-off-by: Giuliano Procida <gprocida@google.com>