Add support for new pnacl native toolchain driver

ports/x264/nacl.patch

 diff --git a/common/cpu.c b/common/cpu.c
 --- a/common/cpu.c
 +++ b/common/cpu.c
 @@ -93,7 +93,7 @@ const x264_cpu_name_t x264_cpu_names[] =
      {"", 0},
  };
  
 -#if (ARCH_PPC && SYS_LINUX) || (ARCH_ARM && !HAVE_NEON)
 +#if (ARCH_PPC && SYS_LINUX) || (ARCH_ARM && HAVE_ARMV6 && !HAVE_NEON)
  #include <signal.h>
  #include <setjmp.h>
  static sigjmp_buf jmpbuf;
 diff --git a/configure b/configure
 --- a/configure
 +++ b/configure
 @@ -547,6 +547,16 @@ case $host_os in
          LDFLAGSCLI="$LDFLAGSCLI -lshell32"
          [ $compiler = GNU ] && RC="${RC-${cross_prefix}windres}" || RC="${RC-rc}"
          ;;
 +    *nacl*)
 +        SYS="NACL"
 +        define HAVE_MALLOC_H
-+        if [[ $(basename ${CC}) =~ pnacl-* ]]; then
++        if [[ $(basename ${CC}) =~ pnacl-*  || $(basename ${CC}) =~ le32-nacl-* ]]; then
 +            EXE=.pexe
 +        else
 +            EXE=.nexe
 +        fi
 +        libm="-lm"
 +        ;;
      sunos*|solaris*)
          SYS="SunOS"
          define HAVE_MALLOC_H
 @@ -773,11 +783,14 @@ ASFLAGS="$ASFLAGS -DSTACK_ALIGNMENT=$stack_alignment"
  if [ $compiler = GNU ]; then
      echo "int i[2] = {0x42494745,0}; double f[2] = {0x1.0656e6469616ep+102,0};" > conftest.c
      $CC $CFLAGS conftest.c -c -o conftest.o 2>/dev/null || die "endian test failed"
 +    # there is no pnacl-strings binary.
-+    if [[ ! $(basename ${CC}) =~ pnacl-* ]]; then
++    if [[ ! $(basename ${CC}) =~ pnacl-*  && ! $(basename ${CC}) =~ le32-nacl-* ]]; then
      if (${cross_prefix}strings -a conftest.o | grep -q BIGE) && (${cross_prefix}strings -a conftest.o | grep -q FPendian) ; then
          define WORDS_BIGENDIAN
      elif !(${cross_prefix}strings -a conftest.o | grep -q EGIB && ${cross_prefix}strings -a conftest.o | grep -q naidnePF) ; then
          die "endian test failed"
      fi
 +    fi
  fi
  
  # autodetect options that weren't forced nor disabled