[PATCH] Sync config.sub with upstream

[Jeremy Soller]

Redox and Glidix support has been added, a bug with PRU platforms has
been fixed.

diff --git a/config.sub b/config.sub
index 70a4180..62b8259 100755
--- a/config.sub
+++ b/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2016 Free Software Foundation, Inc.

-timestamp='2016-11-03'
+timestamp='2016-12-24'

 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -301,6 +301,7 @@ case $basic_machine in
        | open8 | or1k | or1knd | or32 \
        | pdp10 | pdp11 | pj | pjl \
        | powerpc | powerpc64 | powerpc64le | powerpcle \
+       | pru \
        | pyramid \
        | riscv32 | riscv64 \
        | rl78 | rx \
@@ -428,6 +429,7 @@ case $basic_machine in
        | orion-* \
        | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
        | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
+       | pru-* \
        | pyramid-* \
        | riscv32-* | riscv64-* \
        | rl78-* | romp-* | rs6000-* | rx-* \
@@ -1395,7 +1397,7 @@ case $os in
              | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
              | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
              | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
-             | -chorusos* | -chorusrdb* | -cegcc* \
+             | -chorusos* | -chorusrdb* | -cegcc* | -glidix* \
              | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf*
| -rtems* \
              | -midipix* | -mingw32* | -mingw64* | -linux-gnu* |
-linux-android* \
              | -linux-newlib* | -linux-musl* | -linux-uclibc* \
@@ -1407,7 +1409,7 @@ case $os in
              | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
              | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
              | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-             | -onefs* | -tirtos* | -phoenix* | -fuchsia*)
+             | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox*)
        # Remember, each alternative MUST END IN *, to match a version number.
                ;;
        -qnx*)
@@ -1636,6 +1638,9 @@ case $basic_machine in
        sparc-* | *-sun)
                os=-sunos4.1.1
                ;;
+       pru-*)
+               os=-elf
+               ;;
        *-be)
                os=-beos
                ;;