Try to fix mac and linux

Author: dellis1972

build/BuildLinuxTask.cs

@@ -14,6 +14,6 @@ public override void Run(BuildContext context)
         var buildWorkingDir = "assimp/";
         context.StartProcess("cmake", new ProcessSettings { WorkingDirectory = buildWorkingDir, Arguments = "-DASSIMP_BUILD_TESTS=OFF -DASSIMP_INSTALL=OFF CMakeLists.txt" });
         context.StartProcess("make", new ProcessSettings { WorkingDirectory = buildWorkingDir, Arguments = "" });
-        context.CopyFile(@"assimp/bin/libassimp.so", $"{context.ArtifactsDir}/libassimp.so");
+        context.CopyFile(@"assimp/lib/libassimp.so", $"{context.ArtifactsDir}/libassimp.so");
     }
 }

build/BuildMacOSTask.cs

@@ -14,7 +14,7 @@ public override void Run(BuildContext context)
         var buildWorkingDir = "assimp/";
         context.StartProcess("cmake", new ProcessSettings { WorkingDirectory = buildWorkingDir, Arguments = "-DASSIMP_BUILD_TESTS=OFF -DASSIMP_INSTALL=OFF -DCMAKE_OSX_ARCHITECTURES=\"x86_64;arm64\" CMakeLists.txt" });
         context.StartProcess("make", new ProcessSettings { WorkingDirectory = buildWorkingDir, Arguments = "" });
-        var files = Directory.GetFiles(System.IO.Path.Combine(buildWorkingDir, "bin"), "libassimp.*.*.*.dylib", SearchOption.TopDirectoryOnly);
+        var files = Directory.GetFiles(System.IO.Path.Combine(buildWorkingDir, "lib"), "libassimp.*.*.*.dylib", SearchOption.TopDirectoryOnly);
         context.CopyFile(files[0], $"{context.ArtifactsDir}/libassimp.dylib");
     }
 }