Simplify .gn to reduce size of static lib

[ry]

We noticed that the static lib binaries were quite large. 176mb for mac/debug.

We aren't sure what exactly is causing this, but I thought by simplifying the .gn file we might discover something. With these changes I get:

> ls -lh target/debug/gn_out/obj/librusty_v8.a
-rw-r--r--  1 rld  staff   940K Mar 16 18:54 target/debug/gn_out/obj/librusty_v8.a

[ry]

Link errors when running cargo test tho. Many undefined symbols in the .a.

[piscisaureus]

Can you check what effect this has on the size of deno release executables on different platforms (linux in particular)?

[ry]

I only have mac-debug to report for version 8040a7c

> ls -lh target/debug/gn_out/obj/librusty_v8.a
-rw-r--r--  1 rld  staff   604M Mar 16 23:42 target/debug/gn_out/obj/librusty_v8.a

-_-

[piscisaureus]

I think it might still be worthwhile to land this because it makes the .gn file simpler. It's just that symbol_level=1 needs to stay.

[ry]

Using symbol_level = 0 brings it down to 63M.

[piscisaureus]

Using symbol_level = 0 brings it down to 63M.

Is that desirable? It means that when v8 crashes you get no stack trace at all.