Kernel source debugging support 1/n

- new patch token
- program debug compilation flag
- sip kernel new methods for querying bti and debug
surface size

Change-Id: Icaddd15f269c4b76efdf926f2e346aa61cbaae02

offline_compiler/offline_compiler.cpp

@@ -265,7 +265,9 @@ std::string OfflineCompiler::getStringWithinDelimiters(const std::string &src) {
     start += strlen("R\"===(");
     size_t size = stop - start;
 
-    std::string dst(src, start, size);
+    std::string dst(src, start, size + 1);
+    dst[size] = '\0'; // put null char at the end
+
     return dst;
 }