Add loongarch64 target

Reviewed-by: Richard Levitte <[email protected]>
Reviewed-by: Tomas Mraz <[email protected]>
Reviewed-by: Hugo Landau <[email protected]>
(Merged from openssl#18807)

Author: shipujin

Configurations/10-main.conf

@@ -818,6 +818,13 @@ my %targets = (
         perlasm_scheme   => "linux64",
     },
 
+    # loongarch64 below refers to contemporary LoongArch Architecture
+    # specifications,
+    "linux64-loongarch64" => {
+        inherit_from     => [ "linux-generic64"],
+        perlasm_scheme   => "linux64",
+    },
+
     #### IA-32 targets...
     #### These two targets are a bit aged and are to be used on older Linux
     #### machines where gcc doesn't understand -m32 and -m64