[Bugfix:Autograding] add dwarf 4 option to drmemory (#39)

with g++11 it is necessary to compile with dwarf4 to get line numbers
from DrMemory

            "command" : "clang++ -g -gdwarf-4 -Wall -o a.out *.cpp",
// NOTE: Compiling with the -gdwarf-4 option is required with g++ 11+
            // so that DrMemory can print source code line numbers with.
            // See also:
            // DynamoRIO/drmemory#2485

Also, in PR Submitty/Submitty#9793 the category
for a system call previously in the unknown category is updated so that
the configuration runs without the system call failure.

---------

Co-authored-by: Barb Cutler <Barb Cutler>

examples/08_memory_debugging/config/config.json

@@ -11,7 +11,17 @@
         {
             "type" : "Compilation",
             "title" : "C++ - Compilation (for Dr Memory)",
-            "command" : "clang++ -g -Wall -o a.out *.cpp",
+
+            // ORIGINAL
+            //"command" : "clang++ -g -Wall -o a.out *.cpp",
+
+            // TEMPORARY WORKAROUND
+            "command" : "clang++ -g -gdwarf-4 -Wall -o a.out *.cpp",
+            // NOTE: Compiling with the -gdwarf-4 option is required with g++ 11+
+            // so that DrMemory can print source code line numbers with.
+            // See also:
+            // https://github.com/DynamoRIO/drmemory/issues/2485
+
             "executable_name" : "a.out",
             "points" : 2
         },

examples/18_postgres_database/config/config.json

@@ -50,4 +50,4 @@
       ]
     }
   ]
-}
+}