tests: add vlib/v/tests/profile/profile_test.v regression test

vlib/v/tests/profile/calling_http_get.v

@@ -0,0 +1,10 @@
+import net.http
+
+fn main() {
+	if resp := http.get('http://127.0.0.1:56713/unknown_page') {
+		println(resp.text)
+	} else {
+		println(err)
+	}
+	assert true
+}

vlib/v/tests/profile/profile_test.v

@@ -0,0 +1,21 @@
+import os
+
+const (
+	vexe = os.getenv('VEXE')
+    vroot = os.dir(vexe)
+)
+
+fn test_vexe_exists() {
+	assert vexe.len > 0 
+	assert os.is_file(vexe)
+}
+
+fn test_v_profile_works() {
+	res := os.exec('"$vexe" -profile - run vlib/v/tests/profile/calling_http_get.v') or { panic(err) }
+    // eprintln('res: $res')
+    assert res.exit_code == 0
+    assert res.output.len > 0
+    assert res.output.starts_with('net: socket error')
+    assert res.output.contains(' main__main')
+    assert res.output.contains(' os__init_os_args')
+}