Import kotlin.coroutines.experimental for generated sequences on all platforms

This will add import to common generated sources

libraries/stdlib/common/src/generated/_Sequences.kt

@@ -9,6 +9,7 @@ package kotlin.sequences
 //
 
 import kotlin.comparisons.*
+import kotlin.coroutines.experimental.*
 
 /**
  * Returns `true` if [element] is found in the sequence.

libraries/tools/kotlin-stdlib-gen/src/templates/dsl/Writers.kt

@@ -87,7 +87,7 @@ fun List<MemberBuilder>.writeTo(file: File, platformSource: PlatformSourceFile)
         }
         writer.appendln("import kotlin.comparisons.*")
 
-        if (platform != Platform.Common && sourceFile == SourceFile.Sequences) {
+        if (sourceFile == SourceFile.Sequences) {
             writer.appendln("import kotlin.coroutines.experimental.*")
         }