bn/asm/rsaz-avx2.pl: harmonize clang version detection.
@@ -66,7 +66,7 @@ if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
$addx = ($1>=11);
}
-if (!$avx && `$ENV{CC} -v 2>&1` =~ /(^clang version|based on LLVM) ([3-9])\.([0-9]+)/) {
+if (!$avx && `$ENV{CC} -v 2>&1` =~ /((?:^clang|LLVM) version|based on LLVM) ([3-9])\.([0-9]+)/) {
my $ver = $2 + $3/100.0; # 3.1->3.01, 3.10->3.10
$avx = ($ver>=3.0) + ($ver>=3.01);
$addx = ($ver>=3.03);
