Land rapid7#8252, Msf::Util::EXE loop-vbs double var fix

Author: wvu

lib/msf/util/exe.rb

@@ -2143,7 +2143,7 @@ def self.to_executable_fmt(framework, arch, plat, code, fmt, exeopts)
       exe = to_executable_fmt(framework, arch, plat, code, 'exe-small', exeopts)
       Msf::Util::EXE.to_exe_vbs(exe, exeopts.merge({ :persist => false }))
     when 'loop-vbs'
-      exe = exe = to_executable_fmt(framework, arch, plat, code, 'exe-small', exeopts)
+      exe = to_executable_fmt(framework, arch, plat, code, 'exe-small', exeopts)
       Msf::Util::EXE.to_exe_vbs(exe, exeopts.merge({ :persist => true }))
     when 'jsp'
       arch ||= [ ARCH_X86 ]