Switch to MinGW 7.3

AI/Nullkiller/VCAI.cbp

@@ -17,6 +17,10 @@
 					<Add option="-g" />
 				</Compiler>
 				<Linker>
+					<Add option="-lboost_system$(#boost.libsuffix32)" />
+					<Add option="-lboost_thread$(#boost.libsuffix32)" />
+					<Add option="-lboost_chrono$(#boost.libsuffix32)" />
+					<Add option="-lVCMI_lib" />
 					<Add directory="../" />
 					<Add directory="$(#boost.lib32)" />
 				</Linker>
@@ -33,6 +37,10 @@
 				</Compiler>
 				<Linker>
 					<Add option="-s" />
+					<Add option="-lboost_system$(#boost.libsuffix32)" />
+					<Add option="-lboost_thread$(#boost.libsuffix32)" />
+					<Add option="-lboost_chrono$(#boost.libsuffix32)" />
+					<Add option="-lVCMI_lib" />
 					<Add directory="../" />
 					<Add directory="$(#boost.lib32)" />
 				</Linker>
@@ -48,6 +56,10 @@
 					<Add option="-g" />
 				</Compiler>
 				<Linker>
+					<Add option="-lboost_system$(#boost.libsuffix64)" />
+					<Add option="-lboost_thread$(#boost.libsuffix64)" />
+					<Add option="-lboost_chrono$(#boost.libsuffix64)" />
+					<Add option="-lVCMI_lib" />
 					<Add directory="../" />
 					<Add directory="$(#boost.lib64)" />
 				</Linker>
@@ -75,10 +87,6 @@
 		</Compiler>
 		<Linker>
 			<Add option="-lFuzzyLite" />
-			<Add option="-lboost_system$(#boost.libsuffix)" />
-			<Add option="-lboost_thread$(#boost.libsuffix)" />
-			<Add option="-lboost_chrono$(#boost.libsuffix)" />
-			<Add option="-lVCMI_lib" />
 			<Add directory="../.." />
 		</Linker>
 		<Unit filename="AIUtility.cpp" />