PPC: Install dis_ppc.lua.

Makefile

@@ -77,7 +77,7 @@ FILE_MAN= luajit.1
 FILE_PC= luajit.pc
 FILES_INC= lua.h lualib.h lauxlib.h luaconf.h lua.hpp luajit.h
 FILES_JITLIB= bc.lua v.lua dump.lua dis_x86.lua dis_x64.lua dis_arm.lua \
-	      bcsave.lua vmdef.lua
+	      dis_ppc.lua bcsave.lua vmdef.lua
 
 ifeq (,$(findstring Windows,$(OS)))
   ifeq (Darwin,$(shell uname -s))