update report_gen_plot.py: disable plot to X11 display
update report_gen_plot.py: disable plot to X11 display

arijitt/HiBench,Acidburn0zzz/HiBench,yhli365/HiBench,bit1129/HiBench,eriknor/HiBench,cemsbr/HiBench,nsabharwal/HiBench,nsabharwal/HiBench,ConeyLiu/HiBench,arijitt/HiBench,bit1129/HiBench,nsabharwal/HiBench,samklr/HiBench,cemsbr/HiBench,sanjeevtripurari/HiBench,ConeyLiu/HiBench,eriknor/HiBench,nareshgundla/HiBench,GayathriMurali/HiBench,qiansl127/HiBench,yhli365/HiBench,sanjeevtripurari/HiBench,Acidburn0zzz/HiBench,sanjeevtripurari/HiBench,IMCG/HiBench,samklr/HiBench,IMCG/HiBench,nareshgundla/HiBench,GayathriMurali/HiBench,cemsbr/HiBench,qiansl127/HiBench,lvsoft/HiBench,Acidburn0zzz/HiBench,IMCG/HiBench,maismail/HiBench,nareshgundla/HiBench,maismail/HiBench,eriknor/HiBench,ConeyLiu/HiBench,arijitt/HiBench,samklr/HiBench,GayathriMurali/HiBench,maismail/HiBench,lvsoft/HiBench,yhli365/HiBench,nsabharwal/HiBench,arijitt/HiBench,qiansl127/HiBench,cemsbr/HiBench,bit1129/HiBench,nareshgundla/HiBench,bit1129/HiBench,lvsoft/HiBench,IMCG/HiBench,samklr/HiBench,sanjeevtripurari/HiBench,eriknor/HiBench,GayathriMurali/HiBench,maismail/HiBench,qiansl127/HiBench,lvsoft/HiBench,ConeyLiu/HiBench,Acidburn0zzz/HiBench,yhli365/HiBench