Vulkan (Android): hard code path of libvulkan.so, so that users don't need to install vulkan-loader wrapper of termux

Author: CarterLi

src/detection/vulkan/vulkan.c

@@ -39,13 +39,20 @@ static void applyDriverName(VkPhysicalDeviceDriverPropertiesKHR* properties, FFs
 
 static const char* detectVulkan(FFVulkanResult* result)
 {
-    FF_LIBRARY_LOAD(vulkan, "dlopen libvulkan"FF_LIBRARY_EXTENSION " failed",
-        #ifdef __APPLE__
-            "libMoltenVK"FF_LIBRARY_EXTENSION, -1
-        #elif defined(_WIN32)
-            "vulkan-1"FF_LIBRARY_EXTENSION, -1
+    FF_LIBRARY_LOAD(vulkan, "dlopen libvulkan" FF_LIBRARY_EXTENSION " failed",
+        #if __ANDROID__
+            #if UINTPTR_MAX == UINT32_MAX
+                "/system/lib/"
+            #else
+                "/system/lib64/"
+            #endif
+            "libvulkan" FF_LIBRARY_EXTENSION, -1
+        #elif __APPLE__
+            "libMoltenVK" FF_LIBRARY_EXTENSION, -1
+        #elif _WIN32
+            "vulkan-1" FF_LIBRARY_EXTENSION, -1
         #else
-            "libvulkan"FF_LIBRARY_EXTENSION, 2
+            "libvulkan" FF_LIBRARY_EXTENSION, 2
         #endif
     )
     FF_LIBRARY_LOAD_SYMBOL_MESSAGE(vulkan, vkGetInstanceProcAddr)