[RFR]: Add mips(64)(el) detection to platform.m4

[John Paul Adrian Glaubitz]

Hi!

The attached patch adds several mips architectures as detected
platforms to platform.m4 in the same manner s390(x) was added in
revision 786.

Please note that afterwards, generated_configure.sh needs to be
updated so that it matches the definitions in platform.m4. So, my
sponsor should take care of this.

Thanks,
Adrian 

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaub...@debian.org
`. `'   Freie Universitaet Berlin - glaub...@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

# HG changeset patch
# User John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de>
# Date 1502844220 -7200
#      Wed Aug 16 02:43:40 2017 +0200
# Node ID f2790e1a1aafd30b732f253348f749e1568e0f8c
# Parent  ee4f7ff717a9d8514c296cec37d3d820b65d35f4
common: Add mips(64)(el) detection to platform.m4

diff --git a/common/autoconf/platform.m4 b/common/autoconf/platform.m4
--- a/common/autoconf/platform.m4
+++ b/common/autoconf/platform.m4
@@ -66,6 +66,30 @@
       VAR_CPU_BITS=32
       VAR_CPU_ENDIAN=big
       ;;
+    mips)
+      VAR_CPU=mips
+      VAR_CPU_ARCH=mips
+      VAR_CPU_BITS=32
+      VAR_CPU_ENDIAN=big
+      ;;
+    mipsel)
+      VAR_CPU=mipsel
+      VAR_CPU_ARCH=mipsel
+      VAR_CPU_BITS=32
+      VAR_CPU_ENDIAN=little
+      ;;
+    mips64)
+      VAR_CPU=mips64
+      VAR_CPU_ARCH=mips64
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=big
+      ;;
+    mips64el)
+      VAR_CPU=mips64el
+      VAR_CPU_ARCH=mips64el
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
     powerpc)
       VAR_CPU=ppc
       VAR_CPU_ARCH=ppc