Added coroutine import to front-end tests.

compiler/testData/diagnostics/tests/coroutines/suspendApplicability.kt

@@ -1,4 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -NOTHING_TO_INLINE
+import kotlin.coroutines.*
+
 suspend fun notMember(q: Double) = 1
 
 suspend fun String.wrongExtension(x: Any) = 1

compiler/testData/diagnostics/tests/coroutines/suspendFunctions.kt

@@ -1,5 +1,7 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !CHECK_TYPE
+import kotlin.coroutines.*
+
 class Controller {
     suspend fun noParams() {
 

compiler/testData/diagnostics/tests/coroutines/suspendWithCurrentContinuation.kt

@@ -1,5 +1,7 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !CHECK_TYPE
+import kotlin.coroutines.*
+
 class Controller {
     suspend fun noParams(): Unit = suspendWithCurrentContinuation {
         if (hashCode() % 2 == 0) {

compiler/testData/diagnostics/tests/coroutines/tailCalls/forbidden.kt

@@ -1,4 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.coroutines.*
 
 fun nonSuspend() {}
 

compiler/testData/diagnostics/tests/coroutines/tailCalls/nothingTypedSuspendFunction.kt

@@ -1,4 +1,6 @@
 // Tail calls are not allowed to be Nothing typed. See KT-15051
+import kotlin.coroutines.*
+
 suspend fun suspendLogAndThrow(exception: Throwable): Nothing = <!SUSPENSION_CALL_MUST_BE_USED_AS_RETURN_VALUE!>suspendWithCurrentContinuation { c ->
     c.resumeWithException(exception)
     SUSPENDED

compiler/testData/diagnostics/tests/coroutines/tailCalls/tryCatch.kt

@@ -1,4 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.coroutines.*
 
 fun nonSuspend() {}
 

compiler/testData/diagnostics/tests/coroutines/tailCalls/valid.kt

@@ -1,4 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
+import kotlin.coroutines.*
 
 suspend fun baz() = 1