Add support for new pnacl native toolchain driver

ports/pkg/nacl.patch

 diff --git a/compat/Makefile.am b/compat/Makefile.am
 --- a/compat/Makefile.am
 +++ b/compat/Makefile.am
 @@ -1,8 +1,7 @@
 -noinst_LTLIBRARIES=    libbsd_compat.la
  noinst_HEADERS=                bsd_compat.h endian_util.h \
                         humanize_number.h
  
 -libbsd_compat_la_SOURCES=      basename.c \
 +sources=       basename.c \
@@ skipping 733 matching lines @@
  
         return (0);
  }
 +#endif
  
 -#ifndef __DragonFly__
 +#if !defined(__DragonFly__) && !defined(__native_client__)
  int
  pkg_get_myarch(char *dest, size_t sz)
  {
-@@ -987,3 +993,49 @@ pkg_get_myarch(char *dest, size_t sz)
+@@ -987,3 +993,51 @@ pkg_get_myarch(char *dest, size_t sz)
  }
  #endif
  
 +#ifdef __native_client__
 +int
 +pkg_get_myarch_legacy(char *dest, size_t sz)
 +{
 +       char current[sz];
 +       int ret;
 +
 +       if ((ret = pkg_get_myarch(current, sizeof(current))) != EPKG_OK)
 +               return ret;
 +
 +       return pkg_arch_to_legacy(current, dest, sz);
 +}
 +
 +int
 +pkg_get_myarch(char *dest, size_t sz)
 +{
 +       char * os_name = "nacl";
 +#ifdef __arm__
 +       const char* cpu_name = "arm";
 +#elif defined __i386__
 +       const char* cpu_name = "i686";
 +#elif defined __x86_64__
 +       const char* cpu_name = "x86_64";
++#elif defined __le32__
++       const char* cpu_name = "le32";
 +#elif defined __pnacl__
 +       const char* cpu_name = "pnacl";
 +#else
 +#error "Unknown architecture"
 +#endif
 +       long long major_version = 0; 
 +       char *spec = NULL;
 +       int ret = EPKG_OK;
 +
 +       asprintf(&spec, "%s:%lld:%s", os_name, major_version, cpu_name);
@@ skipping 1391 matching lines @@
  
 +if DYNAMIC
 +       GENERIC_LDADD+= $(top_builddir)/compat/libbsd_compat.la -lutil
 +else
 +       GENERIC_LDADD+= $(top_builddir)/compat/libbsd_compat_static.la
 +endif
 +
  if HAVE_ELF_ABI
  if LIBELF_BUNDLED
  GENERIC_LDADD+=        $(top_builddir)/external/libelf_static.la