gotypes,tests: test case for issue #195 (#214)

Adds test cases for the bug in #195, similar to #212.

Updates #195
Updates #191

tests/fixedbugs/issue195/asm.go

@@ -0,0 +1,15 @@
+//go:build ignore
+// +build ignore
+
+package main
+
+import (
+	. "github.com/mmcloughlin/avo/build"
+)
+
+func main() {
+	TEXT("Issue195", NOSPLIT|NOFRAME, "func(x *uint64, y uint32)")
+	Doc("Issue195 tests for correct argument size.")
+	RET()
+	Generate()
+}