cmd/compile/internal/staticdata: remove use of `""` in embed linker symbols
cmd/compile/internal/staticdata: remove use of `""` in embed linker symbols

Not strictly necessary for CL 393715, but this is necessary if we want
to remove the logic from cmd/internal/obj for substituting `""` in
linker symbol names.

Updates #51734.

Change-Id: Ib13cb12fa3973389ca0c1c9a9209e00c30dc9431
Reviewed-on: https://go-review.googlesource.com/c/go/+/406058
Run-TryBot: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: David Chase <ae171625adc8645b8b79b7e405a6da5aba5341e0@google.com>

nawawi/go,golang/go,golang/go,nawawi/go,nawawi/go,nawawi/go,golang/go,golang/go,nawawi/go,nawawi/go,golang/go,nawawi/go,nawawi/go,golang/go,golang/go,golang/go