Include assert.h during C compilation (#4)

Fix for https://github.com/ROCm/ROCm/issues/3997. When compiling a C program that includes rdc/rdc.h, multiple assertion errors are thrown without this header included.

Change-Id: Ie5b5c1a1a17c8207cf9b1be23b31193e260d5c1a

Co-authored-by: harkgill-amd <harkgill@amd.com>

[ROCm/rdc commit: 83f36f1673]

projects/rdc/include/rdc/rdc.h

@@ -41,6 +41,7 @@ extern "C" {
 #else
 #include <stddef.h>
 #include <stdint.h>
+#include <assert.h>
 #endif  // __cplusplus
 
 /** \file rdc.h