Add tests for varargs table packing

tests/vararg-pack-1.lua

@@ -0,0 +1,9 @@
+local function foo(...)
+    local arg = {...}
+    for k = 1, #arg do
+        print(arg[k])
+    end
+end
+
+foo("hello", "boy")
+

tests/vararg-pack-2.lua

@@ -0,0 +1,10 @@
+local function foo(msg, ...)
+    local arg = {...}
+    print(msg)
+    for k = 1, #arg do
+        print(arg[k])
+    end
+end
+
+foo("Hey!", "hello", "boy")
+

tests/vararg-pack-3.lua

@@ -0,0 +1,10 @@
+local function foo(msg, ...)
+    local arg = {"wait", "a", "moment", ...}
+    print(msg)
+    for k = 1, #arg do
+        print(arg[k])
+    end
+end
+
+foo("Hey", "hello", "boy")
+

tests/vararg-pack-4.lua

@@ -0,0 +1,13 @@
+local function foo(x)
+    return x, 2*x, x^2-1
+end
+
+local function boo(x)
+    local arg = { foo(x) }
+    for k = 1, #arg do
+        print(arg[k])
+    end
+end
+
+boo(7)
+

tests/vararg-pack-5.lua

@@ -0,0 +1,9 @@
+local function foo(...)
+    local arg = {..., "friend"}
+    for k = 1, #arg do
+        print(arg[k])
+    end
+end
+
+foo("hello", "boy")
+