Add Address Sanitizer suppression list.

This replaces the unnecessary deallocations on program termination.
Passing in the suppression list environment variable via setenv()
doesn't seem to work, so I've added a comment in the Makefile to explain
invocation.

src/ChunkManager.cpp

@@ -6,12 +6,6 @@
 std::map<std::pair<int, int>, Chunk*> ChunkManager::chunks;
 
 void ChunkManager::init() {} // stubbed
-void ChunkManager::cleanup() {
-    // cleans up all the allocated chunks
-    for (auto& pair : chunks) {
-        delete pair.second;
-    }
-}
 
 void ChunkManager::addNPC(int posX, int posY, int32_t id) {
     std::pair<int, int> pos = grabChunk(posX, posY);

src/TableData.cpp

@@ -189,19 +189,6 @@ void TableData::init() {
     }
 }
 
-void TableData::cleanup() {
-    /*
-     * This is just to shut the address sanitizer up. Dynamically allocated data
-     * doesn't need to be cleaned up if it's supposed to last the program's full runtime.
-     */
-    for (auto& pair : MissionManager::Rewards)
-        delete pair.second;
-    for (auto& pair : MissionManager::Tasks)
-        delete pair.second;
-    for (auto& pair : NPCManager::NPCs)
-        delete pair.second;
-}
-
 /*
 * Some item categories either don't possess iEquipLoc or use a different value for item type.
 */

src/main.cpp

@@ -49,9 +49,6 @@ void terminate(int arg) {
         shardThread->join();
     }
 
-    TableData::cleanup();
-    ChunkManager::cleanup();
-
     exit(0);
 }