RFR (XS) 8078404: VERBOSE make flag is not handled properly

[Stanislav Baiduzhyi]

Hi All,

Please review and sponsor following webrev. It fixes the use of VERBOSE make 
flag for openjdk 8. Currently, executing 'build VERBOSE=1 images' fails with 
"No rule to make target '1'".

Webrev:
https://487f7412f3e78e1958440a7d4d778f6aa5da2088.googledrive.com/host/0B5Kp-cB1sXJrfmN3c3hidnYzcWp3X0pwMjN2cXM1YUtmLW1WdzlyeU45eHF3RHI5X09uX00/fix-verbose/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8078404

-- 
Regards,
    Stas