Do not use gold linker with stabs debug format

The gold linker and stabs format interact badly, negating not only
the memory pressure savings intended with stabs but producing much
larger debug binaries.

Change-Id: Ic2af8dbcc274ae84e4d5fbe474138e4dc5f96f56
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>