[WindowsKernel]add Release build options

[Qfrost911]

Summary

Using "Release" options to build Windows NT Kernel Driver, the error will be raised.

lld-link : error : could not open '/RELEASE': no such file or directory

This patch add release options in Options.td to solve this problem.

[Qfrost911]

This flag do nothing. It is defined only for link.exe compatibility.

lld/COFF/Options.td

 def incl : Joined<["/", "-", "/?", "-?"], "include:">,
     HelpText<"Force symbol to be added to symbol table as undefined one">;
 
 // "def" is also a keyword.
 def deffile : Joined<["/", "-", "/?", "-?"], "def:">,
     HelpText<"Use module-definition file">;
 
 def debug : F<"debug">, HelpText<"Embed a symbol table in the image">;
+def release : F<"release">, HelpText<"Link without symbol table in the image">;
 def debug_opt : P<"debug", "Embed a symbol table in the image with option">;
 def debugtype : P<"debugtype", "Debug Info Options">;
 def dll : F<"dll">, HelpText<"Create a DLL">;
 def driver : F<"driver">, HelpText<"Generate a Windows NT Kernel Mode Driver">;
 def driver_wdm : F<"driver:wdm">,
     HelpText<"Set IMAGE_FILE_UP_SYSTEM_ONLY bit in PE header">;
 def driver_uponly : F<"driver:uponly">,
     HelpText<"Set IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER bit in PE header">;