Allow re-targeting of naclports install

examples/games/nethack-3.4.3/nacl-nethack-3.4.3.patch

 --- nethack-3.4.3-orig/win/tty/termcap.c        2003-12-07 15:39:13.000000000 -0800
 +++ nethack-3.4.3/win/tty/termcap.c     2011-09-27 13:38:17.000000000 -0700
 @@ -836,10 +836,6 @@
  
  #include <curses.h>
  
 -#ifndef LINUX
 -extern char *tparm();
 -#endif
 -
@@ skipping 239 matching lines @@
 +LINK=$(CXX)
  
  # Pick the SYSSRC and SYSOBJ lines corresponding to your desired operating
  # system.
 @@ -151,14 +151,14 @@
  # flags for debugging:
  # CFLAGS = -g -I../include
  
 -CFLAGS = -O -I../include
 -LFLAGS = 
-+CFLAGS := $(NACL_CCFLAGS) -I../include -I$(NACL_SDK_USR_INCLUDE)/ncurses
++CFLAGS := $(NACL_CCFLAGS) -I../include -I$(NACLPORTS_INCLUDE)/ncurses
 +LFLAGS = $(NACL_LDFLAGS)
  
  # The Qt and Be window systems are written in C++, while the rest of
  # NetHack is standard C.  If using Qt, uncomment the LINK line here to get
  # the C++ libraries linked in.
  CXXFLAGS = $(CFLAGS) -I. -I$(QTDIR)/include
 -CXX=g++
 +#CXX=g++
  #LINK=g++
  #      For cross-compiling, eg. with gcc on Linux (see also CC further up):
@@ skipping 104 matching lines @@
 --- nethack-3.4.3-orig/win/tty/termcap.c        2003-12-07 15:39:14.000000000 -0800
 +++ nethack-3.4.3/win/tty/termcap.c     2011-09-27 13:38:17.000000000 -0700
 @@ -108,6 +108,7 @@
  # if defined(TOS) && defined(__GNUC__)
         if (!term)
                 term = "builtin";               /* library has a default */
 +}
  # endif
         if (!term)
  #endif