[components] More //src/sys/build -> //build/components
[components] More //src/sys/build -> //build/components

Some fun commands used, for my records:

find . -name "*.gn*" -type f -exec sed -i 's|src\/sys\/build\/.*\.gni|build/components.gni|g' {} \;
for file in $(git diff --name-only HEAD HEAD^); do cp $file $file.tmp; uniq $file.tmp $file; rm $file.tmp; done

Change-Id: Ie7f087adbdb7d6d4ea6f2fb7701fe3e15c2c4347
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/514065
Fuchsia-Auto-Submit: Shai Barack <26f7e63019997c01025f0d62bc232ac0a295d926@google.com>
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Justin Mattson <934cdf432bd17800e58acd6abaeb522b005818ca@google.com>

google/zerocopy,google/zerocopy