update:support declared function in classfile's overload decl

[luoliwoshang]

1874

The overloaded function declaration in classfile will eventually become an overloaded method of type classfile

Rect.gox

func addString(a, b string) string {
    return a + b
}

func addInt(a, b int) int {
    return a + b
}

func add = (
    addInt
    addString
)

autogen.go

package main

const Gopo_Rect_add = ".addInt,.addString"

type Rect struct {
}

func (this *Rect) addString(a string, b string) string {
    return a + b
}
func (this *Rect) addInt(a int, b int) int {
    return a + b
}

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.29%. Comparing base (01bb888) to head (d4c5639).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1875 +/- ## ========================================== + Coverage 93.28% 93.29% +0.01% ========================================== Files 41 41 Lines 11612 11631 +19 ========================================== + Hits 10832 10851 +19 Misses 623 623 Partials 157 157 ```

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