Adds function names to host functions and improves logging listener (#697)

This improves the experimental logging listener to show parameter name
and values like so:

```
--> ._start.command_export()
        	--> .__wasm_call_ctors()
        		--> .__wasilibc_initialize_environ()
        			==> wasi_snapshot_preview1.environ_sizes_get(result.environc=1048572,result.environBufSize=1048568)
        			<== ESUCCESS
        		<-- ()
        		==> wasi_snapshot_preview1.fd_prestat_get(fd=3,result.prestat=1048568)
        		<== ESUCCESS
        		--> .dlmalloc(2)
        			--> .sbrk(0)
        			<-- (1114112)
        		<-- (1060080)
--snip--
```

The convention `==>` implies it was a host function call
(def.IsHostFunction). This also improves the lifecycle by creating
listeners during compile. Finally, this backfills param names for
assemblyscript and wasi.

Signed-off-by: Adrian Cole <adrian@tetrate.io>

internal/wasm/function_definition_test.go

@@ -1,6 +1,7 @@
 package wasm
 
 import (
+	"reflect"
 	"testing"
 
 	"github.com/tetratelabs/wazero/api"
@@ -9,6 +10,7 @@ import (
 
 func TestModule_BuildFunctionDefinitions(t *testing.T) {
 	nopCode := &Code{nil, []byte{OpcodeEnd}}
+	fnV := reflect.ValueOf(func() {})
 	tests := []struct {
 		name                             string
 		m                                *Module
@@ -26,6 +28,22 @@ func TestModule_BuildFunctionDefinitions(t *testing.T) {
 				GlobalSection: []*Global{{}},
 			},
 		},
+		{
+			name: "host func",
+			m: &Module{
+				TypeSection:         []*FunctionType{v_v},
+				FunctionSection:     []Index{0},
+				HostFunctionSection: []*reflect.Value{&fnV},
+			},
+			expected: []*FunctionDefinition{
+				{
+					index:          0,
+					debugName:      ".$0",
+					isHostFunction: true,
+					funcType:       v_v,
+				},
+			},
+		},
 		{
 			name: "without imports",
 			m: &Module{