mk: teach about wget on SunOS

Author: alarixnia

mk/tools/tools.SunOS.mk

@@ -186,6 +186,9 @@ TOOLS_PLATFORM.sdiff?=		/usr/bin/sdiff
 .if exists(/usr/gnu/bin/sed)
 TOOLS_PLATFORM.sed?=		/usr/gnu/bin/sed
 .endif
+.if exists(/usr/sfw/bin/wget)
+TOOLS_PLATFORM.wget?=		/usr/sfw/bin/wget
+.endif
 TOOLS_PLATFORM.sh?=		/bin/ksh
 TOOLS_PLATFORM.sleep?=		/bin/sleep
 .if exists(/usr/bin/soelim)