HDFS-13338. Update BUILDING.txt for building native libraries.  Contributed by Takanobu Asanuma.
HDFS-13338. Update BUILDING.txt for building native libraries.  Contributed by Takanobu Asanuma.

ucare-uchicago/hadoop,wwjiang007/hadoop,wwjiang007/hadoop,JingchengDu/hadoop,apache/hadoop,wwjiang007/hadoop,lukmajercak/hadoop,steveloughran/hadoop,dierobotsdie/hadoop,littlezhou/hadoop,ChetnaChaudhari/hadoop,xiao-chen/hadoop,mapr/hadoop-common,dennishuo/hadoop,steveloughran/hadoop,steveloughran/hadoop,GeLiXin/hadoop,JingchengDu/hadoop,GeLiXin/hadoop,ChetnaChaudhari/hadoop,mapr/hadoop-common,apache/hadoop,plusplusjiajia/hadoop,apache/hadoop,apurtell/hadoop,szegedim/hadoop,ChetnaChaudhari/hadoop,apurtell/hadoop,wwjiang007/hadoop,plusplusjiajia/hadoop,mapr/hadoop-common,JingchengDu/hadoop,apache/hadoop,lukmajercak/hadoop,szegedim/hadoop,plusplusjiajia/hadoop,ucare-uchicago/hadoop,szegedim/hadoop,ChetnaChaudhari/hadoop,littlezhou/hadoop,wwjiang007/hadoop,xiao-chen/hadoop,apache/hadoop,dierobotsdie/hadoop,xiao-chen/hadoop,GeLiXin/hadoop,steveloughran/hadoop,apache/hadoop,apurtell/hadoop,mapr/hadoop-common,JingchengDu/hadoop,mapr/hadoop-common,xiao-chen/hadoop,dennishuo/hadoop,plusplusjiajia/hadoop,nandakumar131/hadoop,ucare-uchicago/hadoop,wwjiang007/hadoop,ChetnaChaudhari/hadoop,apurtell/hadoop,JingchengDu/hadoop,dennishuo/hadoop,lukmajercak/hadoop,xiao-chen/hadoop,steveloughran/hadoop,mapr/hadoop-common,dierobotsdie/hadoop,nandakumar131/hadoop,lukmajercak/hadoop,lukmajercak/hadoop,szegedim/hadoop,GeLiXin/hadoop,GeLiXin/hadoop,apache/hadoop,steveloughran/hadoop,littlezhou/hadoop,ucare-uchicago/hadoop,plusplusjiajia/hadoop,dierobotsdie/hadoop,ucare-uchicago/hadoop,dennishuo/hadoop,nandakumar131/hadoop,littlezhou/hadoop,xiao-chen/hadoop,xiao-chen/hadoop,szegedim/hadoop,ucare-uchicago/hadoop,steveloughran/hadoop,lukmajercak/hadoop,plusplusjiajia/hadoop,littlezhou/hadoop,littlezhou/hadoop,mapr/hadoop-common,nandakumar131/hadoop,dennishuo/hadoop,nandakumar131/hadoop,ChetnaChaudhari/hadoop,dierobotsdie/hadoop,szegedim/hadoop,lukmajercak/hadoop,dierobotsdie/hadoop,JingchengDu/hadoop,apurtell/hadoop,ucare-uchicago/hadoop,GeLiXin/hadoop,dierobotsdie/hadoop,ChetnaChaudhari/hadoop,dennishuo/hadoop,GeLiXin/hadoop,nandakumar131/hadoop,dennishuo/hadoop,szegedim/hadoop,JingchengDu/hadoop,apurtell/hadoop,apurtell/hadoop,plusplusjiajia/hadoop,littlezhou/hadoop,nandakumar131/hadoop,wwjiang007/hadoop