Set sorting priorities for 5.0.2 and 5.1.0 installer components

Highest priority items will be on top.
Leave some space between.

5.0.2

msvc2010 32 bit             550
msvc2010 32 bit(OpenGl)     500
msvc2012 64 bit             350
MinGW 4.7                   200
Source Components           10

5.1.0

msvc2010 32 bit             550
msvc2010 32 bit(OpenGl)     500
msvc2012 32 bit             400
msvc2012 64 bit             350
msvc2012 64 bit(OpenGl)     300
MinGW 4.7                   200
MinGW 4.8                   190
Android                     100
Source Components           10

Change-Id: I70df11a5e5d4fc6f2aaeea7a09d352482b0a7638
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>