Resolves: tdf#75788 build jpeg-turbo without --with-jpeg8

Change-Id: I3da1559bd3434d574db65a3b492e1060c46143ee
Reviewed-on: https://gerrit.libreoffice.org/38849Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

external/jpeg-turbo/ExternalProject_jpeg-turbo.mk

@@ -30,7 +30,6 @@ $(call gb_ExternalProject_get_state_target,jpeg-turbo,configure) :
 			--with-pic \
 			--enable-static \
 			--disable-shared \
-			--with-jpeg8 \
 			--without-java \
 			--without-turbojpeg \
 			$(if $(NASM),,--without-simd) \