Fix building wxQt under HaikuOS and make it default

Recognize HaikuOS and work around several platforms with socket-related
functions there.

Also make wxQt the default port under this platform.

See #9168.

build/aclocal/bakefile.m4

@@ -385,7 +385,7 @@ AC_DEFUN([AC_BAKEFILE_SHARED_LD],
       ;;
 
       powerpc-apple-macos* | \
-      *-*-freebsd* | *-*-openbsd* | *-*-netbsd* | *-*-gnu* | *-*-k*bsd*-gnu | \
+      *-*-freebsd* | *-*-openbsd* | *-*-haiku* | *-*-netbsd* | *-*-gnu* | *-*-k*bsd*-gnu | \
       *-*-mirbsd* | \
       *-*-sunos4* | \
       *-*-osf* | \
@@ -435,7 +435,7 @@ AC_DEFUN([AC_BAKEFILE_SHARED_VERSIONS],
     SONAME_FLAG=
 
     case "${BAKEFILE_HOST}" in
-      *-*-linux* | *-*-freebsd* | *-*-openbsd* | *-*-netbsd* | \
+      *-*-linux* | *-*-freebsd* | *-*-openbsd* | *-*-haiku* | *-*-netbsd* | \
       *-*-k*bsd*-gnu | *-*-mirbsd* | *-*-gnu* )
         if test "x$SUNCXX" = "xyes"; then
             SONAME_FLAG="-h "