app: [Windows] use NewLazySystemDLL for kernel32.dll

In order to avoid DLL preloading attacks, we should always load our system
dependencies using the helper that only searches the system library path.

Thanks to Mohsen Mirzakhani and Utkarsh Satya Prakash for bringing this to
our attention.

Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>

app/log_windows.go

@@ -4,14 +4,15 @@ package app
 
 import (
 	"log"
-	"syscall"
 	"unsafe"
+
+	syscall "golang.org/x/sys/windows"
 )
 
 type logger struct{}
 
 var (
-	kernel32           = syscall.NewLazyDLL("kernel32")
+	kernel32           = syscall.NewLazySystemDLL("kernel32")
 	outputDebugStringW = kernel32.NewProc("OutputDebugStringW")
 	debugView          *logger
 )