[Pidgin] #14960: Drop unnecessary MAKENSISOPT from Windows build

[Pidgin]

#14960: Drop unnecessary MAKENSISOPT from Windows build
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 Reporter:  renatosilva         |        Owner:           
     Type:  patch               |       Status:  new      
Milestone:                      |    Component:  libpurple
  Version:  2.10.1              |   Resolution:           
 Keywords:  windows build nsis  |  
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Comment(by renatosilva):

 '''Please ignore the duplication above'''

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Ticket URL: <http://developer.pidgin.im/ticket/14960#comment:1>
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