Biggish refactor to break cycles; my build rules were full of them. cpm builds,

which requires top and topgen.

plat/pc86/build-pkg.lua

@@ -0,0 +1,23 @@
+include("plat/build.lua")
+
+ackfile {
+	name = "boot",
+	srcs = { "./boot.s" },
+	vars = { plat = "pc86" }
+}
+
+build_plat_libs {
+	name = "libs",
+	arch = "i86",
+	plat = "pc86",
+}
+
+installable {
+	name = "pkg",
+	map = {
+		"+tools",
+		"+libs",
+		["$(PLATIND)/pc86/boot.o"] = "+boot"
+	}
+}
+