build/tests: implement passing interop linker args to compiler

buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy

@@ -202,7 +202,12 @@ class RunInteropKonanTest extends KonanTest {
 
         String interopStubsBc = new File(interopConf.nativeLibsDir, interop + "stubs.bc").absolutePath
 
-        runCompiler(filesToCompile, exe, ["-library", interopBc, "-nativelibrary", interopStubsBc])
+        List<String> linkerArguments = interopConf.linkerOpts // TODO: add arguments from .def file
+
+        List<String> compilerArguments = ["-library", interopBc, "-nativelibrary", interopStubsBc] +
+                linkerArguments.collectMany { ["-linkerArg", it] }
+
+        runCompiler(filesToCompile, exe, compilerArguments)
     }
 }
 

buildSrc/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy

@@ -32,7 +32,7 @@ class NamedNativeInteropConfig implements Named {
     private List<String> compilerOpts = []
     private List<String> headers;
     private String linker
-    private List<String> linkerOpts = []
+    List<String> linkerOpts = []
     private FileCollection linkFiles;
     private List<String> linkTasks = []
 
@@ -177,6 +177,8 @@ class NamedNativeInteropConfig implements Named {
 
             // defer as much as possible
             doFirst {
+                List<String> linkerOpts = this.linkerOpts
+
                 linkTasks.each {
                     linkerOpts += project.tasks.getByPath(it).outputs.files.files
                 }