Add tasks for all the new languages

Task/Call-a-function/Phix/call-a-function-3.phix

@@ -0,0 +1,6 @@
+function myfunction(integer a, string b="default")
+    return {a,b}
+end function
+--? myfunction() -- illegal, compile-time error
+?myfunction(1) -- displays {1,"default"}
+?myfunction(2,"that") -- displays {2,"that"}