Sim compiler - don't generate .bin file.

This file is unnecessary for sim targets, and the user's machine may not
have [g]objcopy installed.
diff --git a/compiler/sim/compiler.yml b/compiler/sim/compiler.yml
index eaeccec..0eba296 100644
--- a/compiler/sim/compiler.yml
+++ b/compiler/sim/compiler.yml
@@ -31,6 +31,7 @@
 compiler.flags.default: [compiler.flags.base, -O1]
 compiler.flags.debug: [compiler.flags.base, -O0]
 compiler.ld.mapfile: false
+compiler.ld.binfile: false
 
 # Linux.
 compiler.flags.base.LINUX: >