* Remove standard C headers since we have vmlinux.h already
* Simplify get_goroutine_id() implementation, this reduces a map
and thus reduces runtime memory comsumption.
While at it, unify all indention using 4 spaces.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Add some dummy go files so that 'go mod vendor' works for modules that
require Delve, becuase directories that do not contain any go code will
not be vendored.
