scripts:Mark 639 unimplemented in the database

I believe VALIDATION_ERROR_00639 was marked as implemented because the
case is handled in parameter_checker, but the code itself has not been
updated so I'm switching it back to 'N' in the database for now until
the error code is actually updated.
diff --git a/layers/vk_validation_error_database.txt b/layers/vk_validation_error_database.txt
index 80213fe..674d22a 100644
--- a/layers/vk_validation_error_database.txt
+++ b/layers/vk_validation_error_database.txt
@@ -629,7 +629,7 @@
 VALIDATION_ERROR_00636~^~U~^~Unknown~^~vkFlushMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'pMemoryRanges must be a pointer to an array of memoryRangeCount valid VkMappedMemoryRange structures' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkFlushMappedMemoryRanges)~^~
 VALIDATION_ERROR_00637~^~U~^~Unknown~^~vkFlushMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'memoryRangeCount must be greater than 0' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkFlushMappedMemoryRanges)~^~
 VALIDATION_ERROR_00638~^~Y~^~Unknown~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'device must be a valid VkDevice handle' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkInvalidateMappedMemoryRanges)~^~
-VALIDATION_ERROR_00639~^~Y~^~Unknown~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'pMemoryRanges must be a pointer to an array of memoryRangeCount valid VkMappedMemoryRange structures' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkInvalidateMappedMemoryRanges)~^~
+VALIDATION_ERROR_00639~^~N~^~Unknown~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'pMemoryRanges must be a pointer to an array of memoryRangeCount valid VkMappedMemoryRange structures' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkInvalidateMappedMemoryRanges)~^~
 VALIDATION_ERROR_00640~^~U~^~Unknown~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'memoryRangeCount must be greater than 0' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#vkInvalidateMappedMemoryRanges)~^~
 VALIDATION_ERROR_00641~^~U~^~Unknown~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'memory must currently be mapped' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkMappedMemoryRange)~^~
 VALIDATION_ERROR_00642~^~Y~^~InvalidMemoryMapping~^~vkInvalidateMappedMemoryRanges~^~For more information refer to Vulkan Spec Section '10.2.1. Host Access to Device Memory Objects' which states 'If size is not equal to VK_WHOLE_SIZE, offset and size must specify a range contained within the currently mapped range of memory' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkMappedMemoryRange)~^~