Fix a memory deallocation error that was crashing q2dm.

Also fix a bunch of compile warnings by changing "char *" to "const char *".
diff --git a/emulator/qtools/coverage.cpp b/emulator/qtools/coverage.cpp
index fb1fe52..790f721 100644
--- a/emulator/qtools/coverage.cpp
+++ b/emulator/qtools/coverage.cpp
@@ -137,7 +137,7 @@
             continue;
         if (strcmp(psym->name, ".plt") == 0)
             continue;
-        char *ksym = " ";
+        const char *ksym = " ";
         if (psym->region->flags & region_type::kIsKernelRegion)
             ksym = "k";
         printf("%s %s %s\n", ksym, psym->name, psym->region->path);