Update the extern C decalaration. Add __cpluplus block to unity_handler.h

and include that header in unity_handler.cpp.

frameworks/utest/source/unity_handler.cpp

@@ -18,16 +18,15 @@
 
  #include "utest/harness.h"
  #include "utest/stack_trace.h"
+ #include "utest/unity_handler.h"
 
 
-extern "C"
 void utest_unity_assert_failure(void)
 {
     UTEST_LOG_FUNCTION();
     utest::v1::Harness::raise_failure(utest::v1::REASON_ASSERTION);
 }
 
-extern "C"
 void utest_unity_ignore_failure(void)
 {
     UTEST_LOG_FUNCTION();

frameworks/utest/utest/unity_handler.h

@@ -21,10 +21,18 @@
 
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /// this function is called from the unity module when an assertion failed.
 void utest_unity_assert_failure(void);
 
 /// this function is called from the unity module when an assertion failed, but is ignored.
 void utest_unity_ignore_failure(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif // UTEST_UNITY_ASSERT_FAILURE_H