[performance] don't override user defined properties with fixed values

kotlin-native/tools/benchmarksAnalyzer/build.gradle

@@ -5,8 +5,10 @@ buildscript {
         def properties = new java.util.Properties()
         properties.load(new java.io.FileReader(project.file("$rootBuildDirectory/../gradle.properties")))
         properties.each { k, v->
-            project.logger.info("${project.name} $k: $v")
-            set(k as String, v)
+            def key = k as String
+            def value = project.findProperty(key) ?: v
+            project.logger.info("${project.name} $key: $value")
+            set(key, value)
         }
     }
     ext["withoutEmbedabble"] = true

kotlin-native/tools/benchmarksAnalyzer/buildSrc/build.gradle.kts

@@ -10,7 +10,9 @@ buildscript {
     java.util.Properties().also {
         it.load(java.io.FileReader(project.file("../../../../gradle.properties")))
     }.forEach { k, v->
-        extra[k as String] = v
+        val key = k as String
+        val value = project.findProperty(key) ?: v
+        extra[key] = value
     }
 
     val cacheRedirectorEnabled = findProperty("cacheRedirectorEnabled")?.toString()?.toBoolean() ?: false