Don't #include C Adapter header into its cpp.

Just textually concatenate.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/CAdapterCompile.kt

@@ -21,10 +21,6 @@ import org.jetbrains.kotlin.konan.target.*
 import org.jetbrains.kotlin.konan.file.*
 
 fun produceCAdapterBitcode(clang: TargetClang, headerFileName: String, cppFileName: String, bitcodeFileName: String) {
-
-    val headerDirName = File(headerFileName).absoluteFile.parent
-
-    val clangCommand = clang.clangCXX("-std=c++11", cppFileName, "-I", headerDirName, "-emit-llvm", "-c", "-o", bitcodeFileName)
-
+    val clangCommand = clang.clangCXX("-std=c++11", cppFileName, "-emit-llvm", "-c", "-o", bitcodeFileName)
     runTool(clangCommand)
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/CAdapterGenerator.kt

@@ -426,9 +426,8 @@ internal class CAdapterGenerator(val context: Context,
     }
 
     private fun makeGlobalStruct(top: ExportedElementScope) {
-        outputStreamWriter = context.config.tempFiles
-            .cAdapterHeader
-            .printWriter()
+        val headerFile = context.config.tempFiles.cAdapterHeader
+        outputStreamWriter = headerFile.printWriter()
 
         output("#ifndef KONAN_${prefix.toUpperCase()}_H")
         output("#define KONAN_${prefix.toUpperCase()}_H")
@@ -479,7 +478,9 @@ internal class CAdapterGenerator(val context: Context,
             .cAdapterCpp
             .printWriter()
 
-        output("#include \"${prefix}_api.h\"")
+        // Include header into C++ source.
+        headerFile.forEachLine { it -> output(it) }
+
         output("""
         |struct KObjHeader;
         |typedef struct KObjHeader KObjHeader;