BUG: Fix test that broke on Windows - sharing sources between SHARED and STATIC libraries requires correct export and import decorations in the source code...

Tests/Framework/bar.cxx

@@ -1,9 +1,4 @@
-#ifdef _WIN32
-#  define CM_TEST_LIB_IMPORT  __declspec( dllimport )
-#else 
-#  define CM_TEST_LIB_IMPORT
-#endif
-CM_TEST_LIB_IMPORT void foo();
+void foo();
 int main()
 {
   foo();

Tests/Framework/foo.cxx

@@ -1,5 +1,5 @@
 #include <stdio.h>
-#ifdef _WIN32
+#if defined(_WIN32) && defined(foo_EXPORTS)
 #  define CM_TEST_LIB_EXPORT  __declspec( dllexport )
 #else 
 #  define CM_TEST_LIB_EXPORT