Kill off some usages of c_str.

Also changes some function params, but this is ok.
Some simplifications were also able to be made (ie. killing off strcmps with ==, etc).

Source/Core/Core/PowerPC/JitInterface.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <string>
 #include "Common/ChunkFile.h"
 #include "Core/PowerPC/CPUCoreBase.h"
 
@@ -16,7 +17,7 @@ namespace JitInterface
 	CPUCoreBase *GetCore();
 
 	// Debugging
-	void WriteProfileResults(const char *filename);
+	void WriteProfileResults(const std::string& filename);
 
 	// Memory Utilities
 	bool IsInCodeSpace(u8 *ptr);