properly support unix32-unsigned and unix64-unsigned platforms

Author: firewave

lib/platform.cpp

@@ -111,10 +111,18 @@ bool cppcheck::Platform::set(const std::string& platformstr, std::string& errstr
         t = Type::Unix32;
         platformFile = platformstr;
     }
+    else if (platformstr == "unix32-unsigned") {
+        t = Type::Unix32;
+        platformFile = platformstr;
+    }
     else if (platformstr == "unix64") {
         t = Type::Unix64;
         platformFile = platformstr;
     }
+    else if (platformstr == "unix64-unsigned") {
+        t = Type::Unix64;
+        platformFile = platformstr;
+    }
     else if (platformstr == "native") {
         t = Type::Native;
     }