tests: enable live tests on macos

vlib/builtin/int.v

@@ -398,6 +398,23 @@ pub fn (c byte) str() string {
 	return str
 }
 
+/*
+type rune = int
+
+pub fn (r rune) str() string {
+	mut str := string{
+		str: malloc(2)
+		len: 1
+	}
+	unsafe {
+		str.str[0] = r
+		str.str[1] = `\0`
+	}
+
+	return str
+}
+*/
+
 pub fn (c byte) is_capital() bool {
 	return c >= `A` && c <= `Z`
 }

vlib/v/tests/live_test.v

@@ -107,9 +107,9 @@ fn atomic_write_source(source string) {
 
 //
 fn testsuite_begin() {
-	if os.user_os() !in ['linux', 'solaris'] && os.getenv('FORCE_LIVE_TEST').len == 0 {
+	if os.user_os() !in ['linux', 'solaris', 'macos'] && os.getenv('FORCE_LIVE_TEST').len == 0 {
 		eprintln('Testing the runtime behaviour of -live mode,')
-		eprintln('is reliable only on Linux for now.')
+		eprintln('is reliable only on Linux/macOS for now.')
 		eprintln('You can still do it by setting FORCE_LIVE_TEST=1 .')
 		exit(0)
 	}