Updated config.guess for building under MSYS2

An updated tweak to the distributed ./config.guess script is required for the project to build under MSYS2 (MinGW 64-bit).

Should not affect GPLv2 license.

Before

JHammler@DM-ENG-690 MSYS /d/x264
$ ./configure
./config.guess: unable to guess system type

This script, last modified 2012-09-25, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts from

http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
and
http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD

If the version you run (./config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to config-patches@gnu.org in order to provide the needed
information to handle your system.

config.guess timestamp = 2012-09-25

uname -m = x86_64
uname -r = 3.0.7-338.x86_64
uname -s = MSYS_NT-10.0-18362
uname -v = 2019-07-11 10:58 UTC

/usr/bin/uname -p = unknown
/bin/uname -X =

hostinfo =
/bin/universe =
/usr/bin/arch -k =
/bin/arch = x86_64
/usr/bin/oslevel =
/usr/convex/getsysinfo =

UNAME_MACHINE = x86_64
UNAME_RELEASE = 3.0.7-338.x86_64
UNAME_SYSTEM = MSYS_NT-10.0-18362
UNAME_VERSION = 2019-07-11 10:58 UTC
config.sub: missing argument
Try `config.sub --help' for more information.
Unknown system , edit the configure

After

JHammler@DM-ENG-690 MSYS /d/x264
$ ./configure
platform: X86_64
byte order: little-endian
system: WINDOWS
cli: yes
libx264: internal
shared: no
static: no
asm: yes
interlaced: yes
avs: avisynth
lavf: no
ffms: no
mp4: no
gpl: yes
thread: win32
opencl: yes
filters: crop select_every
lto: no
debug: no
gprof: no
strip: no
PIC: no
bit depth: all
chroma format: all

You can run 'make' or 'make fprofiled' now.

changed the description

Obviously, the user could also just obtain a more up to date version of ./config.guess...

Need to be rebased. Also you should add support to configure for $host_os = msys* to be able compile with Intel Compiler or Microsoft Visual Studio under MSYS2. i.e.

 QPRE="-"
-if [[ $host_os = mingw* || $host_os = cygwin* ]]; then
+if [[ $host_os = mingw* || $host_os = msys* || $host_os = cygwin* ]]; then
     if [[ "$cc_base" = icl || "$cc_base" = icl[\ .]* ]]; then

Also allow pushing to your branch in merge request so we can rebase it ourselves.

added 17 commits

• d553b2da...235ce613 - 16 commits from branch videolan:master
• 506db1f3 - Update config.guess for MSYS2

Compare with previous version

resolved all threads

mentioned in commit JHammler/x264@2f88afca

added 1 commit

• 2f88afca - Support for

Compare with previous version

resolved all threads

merged