fixing module export

src/soft/lib.zig

@@ -0,0 +1,7 @@
+const std = @import("std");
+const vk = @import("vulkan");
+const common = @import("common");
+
+export fn libVulkanExport() void {
+    _ = common;
+}

src/soft/libvulkan.zig

@@ -1,11 +0,0 @@
-const std = @import("std");
-const vk = @import("vulkan");
-const common = @import("common");
-
-pub export fn vk_icdGetInstanceProcAddr(instance: vk.Instance, pName: ?[*:0]const u8) callconv(vk.vulkan_call_conv) vk.PfnVoidFunction {
-    if (pName == null) {
-        return null;
-    }
-    const name = std.mem.span(pName.?);
-    return common.icd.getInstanceProcAddr(instance, name);
-}