update build instructions
update build instructions

dyrock/trafficserver,chenglongwei/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,persiaAziz/trafficserver,taoyunxing/trafficserver,pbchou/trafficserver,davidbz/trafficserver,chenglongwei/trafficserver,reveller/trafficserver,chitianhao/trafficserver,chenglongwei/trafficserver,bryancall/trafficserver,reveller/trafficserver,reveller/trafficserver,clearswift/trafficserver,davidbz/trafficserver,duke8253/trafficserver,persiaAziz/trafficserver,pbchou/trafficserver,rpufky/trafficserver,bryancall/trafficserver,reveller/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,pbchou/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,PSUdaemon/trafficserver,bryancall/trafficserver,taoyunxing/trafficserver,PSUdaemon/trafficserver,bryancall/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,rpufky/trafficserver,chitianhao/trafficserver,reveller/trafficserver,rpufky/trafficserver,reveller/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,taoyunxing/trafficserver,rahmalik/trafficserver,SolidWallOfCode/trafficserver,taoyunxing/trafficserver,rahmalik/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,rahmalik/trafficserver,rahmalik/trafficserver,davidbz/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,PSUdaemon/trafficserver,bryancall/trafficserver,PSUdaemon/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,reveller/trafficserver,rahmalik/trafficserver,PSUdaemon/trafficserver,PSUdaemon/trafficserver,SolidWallOfCode/trafficserver,dyrock/trafficserver,rpufky/trafficserver,pbchou/trafficserver,clearswift/trafficserver,rpufky/trafficserver,duke8253/trafficserver,rahmalik/trafficserver,clearswift/trafficserver,taoyunxing/trafficserver,davidbz/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,reveller/trafficserver,rahmalik/trafficserver,reveller/trafficserver,rpufky/trafficserver,dyrock/trafficserver,taoyunxing/trafficserver,SolidWallOfCode/trafficserver,rpufky/trafficserver,chitianhao/trafficserver,persiaAziz/trafficserver,dyrock/trafficserver,chenglongwei/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,chenglongwei/trafficserver,dyrock/trafficserver,clearswift/trafficserver,bryancall/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,taoyunxing/trafficserver,vmamidi/trafficserver,chenglongwei/trafficserver,rpufky/trafficserver,davidbz/trafficserver,davidbz/trafficserver,dyrock/trafficserver,taoyunxing/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,chenglongwei/trafficserver,chenglongwei/trafficserver,clearswift/trafficserver