[#79] Potential fix for MinGW problems with VMA

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

config/lib/vma/vma.cpp

 
+#include <mutex>
+
 #ifndef NDEBUG
 #define _DEBUG
 #endif
 
+#ifndef _WIN32
+
+#ifndef _aligned_malloc
+#define _aligned_malloc(alignment, size) aligned_alloc((alignment), (size))
+#endif
+
+#endif
+
 #define VMA_IMPLEMENTATION
 #include "vk_mem_alloc.hpp"