build: Append commit hash to the main LND context

It can be disabled via the new `logging.no-commit-hash` config option.

build/config.go

@@ -25,8 +25,9 @@ const (
 //
 //nolint:ll
 type LogConfig struct {
-	Console *consoleLoggerCfg `group:"console" namespace:"console" description:"The logger writing to stdout and stderr."`
-	File    *FileLoggerConfig `group:"file" namespace:"file" description:"The logger writing to LND's standard log file."`
+	Console      *consoleLoggerCfg `group:"console" namespace:"console" description:"The logger writing to stdout and stderr."`
+	File         *FileLoggerConfig `group:"file" namespace:"file" description:"The logger writing to LND's standard log file."`
+	NoCommitHash bool              `long:"no-commit-hash" description:"If set, the commit-hash of the current build will not be included in log lines by default."`
 }
 
 // Validate validates the LogConfig struct values.