all: bring back panic(err.msg) -> panic(err) (#9022)

examples/process/command.v

@@ -10,7 +10,7 @@ fn exec(path string) string {
 	mut cmd := os.Command{
 		path: path
 	}
-	cmd.start() or { panic(err.msg) }
+	cmd.start() or { panic(err) }
 
 	for {
 		line = cmd.read_line()

examples/process/execve.v

@@ -5,7 +5,7 @@ import os
 fn exec(args []string) {
 	os.execve('/bin/bash', args, []) or {
 		// eprintln(err)
-		panic(err.msg)
+		panic(err)
 	}
 }
 

examples/process/process_script.v

@@ -47,7 +47,7 @@ echo redirect 1 to 2  1>&2
 echo line 3
 '
 
-	os.write_file('/tmp/test.sh', script) or { panic(err.msg) }
+	os.write_file('/tmp/test.sh', script) or { panic(err) }
 	// os.chmod("/tmp/test.sh",0o700) //make executable
 
 	// this will work because stderr/stdout are smaller than 4096 chars, once larger there can be deadlocks