all: refactor goenv.Version to add the git sha1 if needed

Previously all (except one!) usage of goenv.Version manually added the
git sha1 hash, leading to duplicate code. I've moved this to do it all
in one place, to avoid this duplication.

builder/build.go

@@ -168,7 +168,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		CodeModel:       config.CodeModel(),
 		RelocationModel: config.RelocationModel(),
 		SizeLevel:       sizeLevel,
-		TinyGoVersion:   goenv.Version,
+		TinyGoVersion:   goenv.Version(),
 
 		Scheduler:          config.Scheduler(),
 		AutomaticStackSize: config.AutomaticStackSize(),
@@ -220,14 +220,10 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		config.Options.GlobalValues = make(map[string]map[string]string)
 	}
 	if config.Options.GlobalValues["runtime"]["buildVersion"] == "" {
-		version := goenv.Version
-		if strings.HasSuffix(goenv.Version, "-dev") && goenv.GitSha1 != "" {
-			version += "-" + goenv.GitSha1
-		}
 		if config.Options.GlobalValues["runtime"] == nil {
 			config.Options.GlobalValues["runtime"] = make(map[string]string)
 		}
-		config.Options.GlobalValues["runtime"]["buildVersion"] = version
+		config.Options.GlobalValues["runtime"]["buildVersion"] = goenv.Version()
 	}
 	if config.TestConfig.CompileTestBinary {
 		// The testing.testBinary is set to "1" when in a test.