add macro definition of assert using polarssl_exit

tests/suites/helpers.function

@@ -15,10 +15,16 @@ typedef UINT32 uint32_t;
 #include <inttypes.h>
 #endif
 
-#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define assert(a) if( !( a ) )                                      \
+{                                                                   \
+    polarssl_fprintf( stderr, "Assertion Failed at %s:%d - %s\n",   \
+                             __FILE__, __LINE__, #a );              \
+    polarssl_exit( 1 );                                             \
+}
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */