Introduce SegmentQueueSynchronizer abstraction for synchronization primitives

Author: ndkoval

Diff for: kotlinx-coroutines-core/build.gradle

@@ -119,8 +119,8 @@ task jvmStressTest(type: Test, dependsOn: compileTestKotlinJvm) {
     enableAssertions = true
     testLogging.showStandardStreams = true
     systemProperty 'kotlinx.coroutines.scheduler.keep.alive.sec', '100000' // any unpark problem hangs test
-    systemProperty 'kotlinx.coroutines.semaphore.segmentSize', '2'
-    systemProperty 'kotlinx.coroutines.semaphore.maxSpinCycles', '10'
+    systemProperty 'kotlinx.coroutines.sqs.segmentSize', '2'
+    systemProperty 'kotlinx.coroutines.sqs.maxSpinCycles', '10'
 }
 
 task jdk16Test(type: Test, dependsOn: [compileTestKotlinJvm, checkJdk16]) {