CMSIS-DSP: Added missing functions to the Python wrapper

Changed the version of Jinja2 required by the wrapper to avoid warnings
when using google colab.
diff --git a/CMSIS/DSP/Testing/testmain.cpp b/CMSIS/DSP/Testing/testmain.cpp
index 59df851..8e14920 100644
--- a/CMSIS/DSP/Testing/testmain.cpp
+++ b/CMSIS/DSP/Testing/testmain.cpp
@@ -11,11 +11,13 @@
 #include "ArrayMemory.h"
 using namespace std;
 
+#ifndef MEMSIZE
 #ifdef BENCHMARK
 #define MEMSIZE 300000
 #else
 #define MEMSIZE 230000
 #endif
+#endif
 
 // Dummy (will be generated by python scripts)
 // char* array describing the tests and the input patterns.