Correct resource path for flavors in android-extensions-plugin
(cherry picked from commit 51abb021bc18b53937fdf2d9616e72519c8173dd)

libraries/tools/kotlin-android-extensions/src/main/kotlin/org/jetbrains/kotlin/android/AndroidSubplugin.kt

diff --git a/libraries/tools/kotlin-android-extensions/src/main/kotlin/org/jetbrains/kotlin/android/AndroidSubplugin.kt b/libraries/tools/kotlin-android-extensions/src/main/kotlin/org/jetbrains/kotlin/android/AndroidSubplugin.kt
index 7d5fa45..759bb79 100644
--- a/libraries/tools/kotlin-android-extensions/src/main/kotlin/org/jetbrains/kotlin/android/AndroidSubplugin.kt
+++ b/libraries/tools/kotlin-android-extensions/src/main/kotlin/org/jetbrains/kotlin/android/AndroidSubplugin.kt
@@ -44,7 +44,7 @@
 
         fun addVariant(sourceSet: AndroidSourceSet) {
             pluginOptions += SubpluginOption("variant", sourceSet.name + ';' +
-                    mainSourceSet.res.srcDirs.joinToString(";") { it.absolutePath })
+                    sourceSet.res.srcDirs.joinToString(";") { it.absolutePath })
         }
 
         addVariant(mainSourceSet)