arch: Add support for ARCv2 CPU

This is based on the ARCv2 32-bit little-endian hard-float ISA.

Closes: #980963
Based-on-patch-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

data/cputable

@@ -22,6 +22,7 @@ i386		i686		(i[34567]86|pentium)	32	little
 ia64		ia64		ia64			64	little
 alpha		alpha		alpha.*			64	little
 amd64		x86_64		(amd64|x86_64)		64	little
+arc		arc		arc			32	little
 armeb		armeb		arm.*b			32	big
 arm		arm		arm.*			32	little
 arm64		aarch64		aarch64			64	little

scripts/Dpkg/Shlibs/Objdump.pm

@@ -100,6 +100,7 @@ use constant {
     ELF_MACH_OR1K           => 92,
     ELF_MACH_XTENSA         => 94,
     ELF_MACH_MICROBLAZE     => 189,
+    ELF_MACH_ARCV2          => 195,
     ELF_MACH_AVR_OLD        => 0x1057,
     ELF_MACH_OR1K_OLD       => 0x8472,
     ELF_MACH_ALPHA          => 0x9026,

scripts/t/Dpkg_Arch.t

@@ -16,7 +16,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 17914;
+use Test::More tests => 18407;
 
 use_ok('Dpkg::Arch', qw(debarch_to_debtuple debarch_to_multiarch
                         debarch_eq debarch_is debarch_is_wildcard
@@ -187,7 +187,7 @@ foreach my $arch (@valid_arches) {
               "bijective triplet $triplet to tuple @tuple");
 }
 
-is(scalar @valid_arches, 539, 'expected amount of known architectures');
+is(scalar @valid_arches, 554, 'expected amount of known architectures');
 
 {
     local $ENV{CC} = 'false';