improve VP8L signature detection by checking the version bits too
improve VP8L signature detection by checking the version bits too

Change-Id: I20bea00b9582d7ea8c7b643616c78f717ce1bdf2

PKRoma/libwebp,redengineer/libwebp,Tekserve/libwebp,Maria1099/webm.libwebp,PKRoma/libwebp,ericmckean/webm.libwebp,zofuthan/libwebp,jiehu5114/libwebp,rxl194/libwebp,iniwf/webm.libwebp,comoyo/gonzo-libwebp,comoyo/gonzo-libwebp,kleopatra999/webm.libwebp,Acidburn0zzz/webm.libwebp,jacklicn/libwebp,redengineer/libwebp,kim42083/webm.libwebp,imazen/libwebp,jiehu5114/libwebp,gshORTON/webm.libwebp,keane83/BLE_IM,zofuthan/libwebp,Tekserve/libwebp,abwiz0086/webm.libwebp,reimaginemedia/webm.libwebp,kim42083/webm.libwebp,jacklicn/libwebp,kalli123/webm.libwebp,ya7lelkom/libwebp,webmproject/libwebp,ttyangf/libwebp,ya7lelkom/libwebp,gshORTON/webm.libwebp,comoyo/gonzo-libwebp,altogother/webm.libwebp,Aexyn/libwebp,comoyo/gonzo-libwebp,kleopatra999/webm.libwebp,Tekserve/libwebp,keane83/BLE_IM,iniwf/webm.libwebp,rxl194/libwebp,ericmckean/webm.libwebp,webmproject/libwebp,ericmckean/webm.libwebp,ttyangf/libwebp,ya7lelkom/libwebp,Acidburn0zzz/webm.libwebp,jacklicn/libwebp,imazen/libwebp,yohunl/libwebp,yohunl/libwebp,keane83/BLE_IM,yohunl/libwebp,appunite/libwebp,reimaginemedia/webm.libwebp,gshORTON/webm.libwebp,redengineer/libwebp,reimaginemedia/webm.libwebp,PKRoma/libwebp,jacklicn/libwebp,matanbs/webm.libwebp,ya7lelkom/libwebp,reimaginemedia/webm.libwebp,iniwf/webm.libwebp,webmproject/libwebp,abwiz0086/webm.libwebp,kim42083/webm.libwebp,Maria1099/webm.libwebp,Acidburn0zzz/webm.libwebp,matanbs/webm.libwebp,comoyo/gonzo-libwebp,jiehu5114/libwebp,kleopatra999/webm.libwebp,rxl194/libwebp,kleopatra999/webm.libwebp,Maria1099/webm.libwebp,zofuthan/libwebp,abwiz0086/webm.libwebp,imazen/libwebp,appunite/libwebp,iniwf/webm.libwebp,webmproject/libwebp,Suvarna1488/webm.libwebp,altogother/webm.libwebp,PKRoma/libwebp,jacklicn/libwebp,matanbs/webm.libwebp,comoyo/gonzo-libwebp,keane83/BLE_IM,ericmckean/webm.libwebp,kim42083/webm.libwebp,gshORTON/webm.libwebp,appunite/libwebp,zofuthan/libwebp,abwiz0086/webm.libwebp,Aexyn/libwebp,altogother/webm.libwebp,Suvarna1488/webm.libwebp,abwiz0086/webm.libwebp,Maria1099/webm.libwebp,iniwf/webm.libwebp,redengineer/libwebp,webmproject/libwebp,appunite/libwebp,PKRoma/libwebp,comoyo/gonzo-libwebp,kalli123/webm.libwebp,rxl194/libwebp,ttyangf/libwebp,Suvarna1488/webm.libwebp,yohunl/libwebp,altogother/webm.libwebp,appunite/libwebp,rxl194/libwebp,Acidburn0zzz/webm.libwebp,kalli123/webm.libwebp,Acidburn0zzz/webm.libwebp,gshORTON/webm.libwebp,yohunl/libwebp,kalli123/webm.libwebp,Aexyn/libwebp,imazen/libwebp,keane83/BLE_IM,ericmckean/webm.libwebp,ttyangf/libwebp,altogother/webm.libwebp,Tekserve/libwebp,appunite/libwebp,jiehu5114/libwebp,jiehu5114/libwebp,zofuthan/libwebp,ttyangf/libwebp,imazen/libwebp,Suvarna1488/webm.libwebp,redengineer/libwebp,Aexyn/libwebp,matanbs/webm.libwebp,Maria1099/webm.libwebp,kalli123/webm.libwebp,ya7lelkom/libwebp,Aexyn/libwebp,PKRoma/libwebp,kleopatra999/webm.libwebp,kim42083/webm.libwebp,reimaginemedia/webm.libwebp,matanbs/webm.libwebp,Suvarna1488/webm.libwebp