[RFR]: Add alpha detection to platform.m4

[John Paul Adrian Glaubitz]

Hi!

The attached patch adds alpha as a detected platform 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. See the diff for revision 786
for details.

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 1502844029 -7200
#      Wed Aug 16 02:40:29 2017 +0200
# Node ID 59dc5047edf858bdf6f23fee49a703777fdcca80
# Parent  c1d93422c78e7c8988b4dad71ff55433b429bbec
common: Add alpha 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
@@ -42,6 +42,12 @@
       VAR_CPU_BITS=32
       VAR_CPU_ENDIAN=little
       ;;
+    alpha*)
+      VAR_CPU=alpha
+      VAR_CPU_ARCH=alpha
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
     arm*)
       VAR_CPU=arm
       VAR_CPU_ARCH=arm
diff --git a/get_source.sh b/get_source.sh
old mode 100644
new mode 100755