update:goptest absolutly path output

[luoliwoshang]

Because the cl error output directory of goptest is the path relative to the project root directory, when absolute path stitching is called, the test directory is changed to the project directory (the project directory is the nearest directory with go.mod)

• When goptest throws an error, change it to output to absolute path

result

/Users/xxxxxx/go-learn/test/test.gop:2:9: undefined: a1