Fix benchmarks after migrating to new MPP plugin syntax

performance/buildSrc/src/main/kotlin/MPPTools.kt

@@ -174,7 +174,7 @@ fun getJvmCompileTime(programName: String): BenchmarkResult =
 
 @JvmOverloads
 fun getNativeCompileTime(programName: String,
-                         tasks: List<String> = listOf("compileKotlinNative", "linkMainReleaseExecutableNative")): BenchmarkResult =
+                         tasks: List<String> = listOf("compileKotlinNative", "linkBenchmarkReleaseExecutableNative")): BenchmarkResult =
         TaskTimerListener.getBenchmarkResult(programName, tasks)
 
 fun getCompileBenchmarkTime(programName: String, tasksNames: Iterable<String>, repeats: Int, exitCodes: Map<String, Int>) =

performance/gradle/benchmark.gradle

@@ -19,6 +19,13 @@ private def determinePreset() {
     preset
 }
 
+def getMingwPath() {
+    def directory = System.getenv("MINGW64_DIR")
+    if (directory == null)
+        directory = "c:/msys64/mingw64"
+    return directory
+}
+
 def hostPreset = determinePreset()
 
 kotlin {
@@ -62,7 +69,7 @@ kotlin {
         binaries {
             executable('benchmark', [RELEASE]) {
                 if (org.gradle.internal.os.OperatingSystem.current().isWindows()) {
-                    linkerOpts("-L${getMingwPath()}/lib")
+                    linkerOpts = ["-L${getMingwPath()}/lib".toString()]
                 }
             }
         }

tools/benchmarksAnalyzer/build.gradle

@@ -102,7 +102,7 @@ kotlin {
 
         fromPreset(presets.mingwX64, 'windows') {
             binaries.all {
-                linkerOpts = ["-L${getMingwPath()}/lib"]
+                linkerOpts = ["-L${getMingwPath()}/lib".toString()]
             }
             compilations.main.cinterops {
                 libcurl {