dwebp.1: fix typo
dwebp.1: fix typo

ICM4 -> IMC4

Change-Id: I065a1ac0dfd0b60efa782bc1a4df1adcb28b90e4

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