dev-java/icedtea: fix build w/ make-4.4

Closes: https://bugs.gentoo.org/882611
Signed-off-by: Sam James <sam@gentoo.org>

dev-java/icedtea/files/openjdk-8-make-4.4.patch

@@ -0,0 +1,13 @@
+https://bugs.gentoo.org/882611
+https://build.opensuse.org/package/view_file/openSUSE:Factory/java-1_8_0-openjdk/make-jobserver-detection.patch?expand=1
+--- openjdk/make/MakeHelpers.gmk
++++ openjdk/make/MakeHelpers.gmk
+@@ -145,7 +145,7 @@ endef
+ 
+ # Hook to be called as the very first thing when running a normal build
+ define AtMakeStart
+-	$(if $(findstring --jobserver,$(MAKEFLAGS)),$(error make -j is not supported, use make JOBS=n))
++	$(if $(findstring jobserver,$(.FEATURES)),,$(error make -j is not supported, use make JOBS=n))
+ 	$(call CheckEnvironment)
+ 	@$(PRINTF) $(LOG_INFO) "Running make as '$(MAKE) $(MFLAGS) $(MAKE_ARGS)'\n"
+ 	@$(PRINTF) "Building $(PRODUCT_NAME) for target '$(call GetRealTarget)' in configuration '$(CONF_NAME)'\n\n"

dev-java/icedtea/icedtea-3.21.0.ebuild

@@ -203,7 +203,9 @@ src_configure() {
 	# ${FILESDIR} directly.
 	mkdir -v gentoo_patches || die
 	cp -v "${FILESDIR}/openjdk-8-hotspot-arrayallocator.patch" gentoo_patches || die
+	cp -v "${FILESDIR}/openjdk-8-make-4.4.patch" gentoo_patches || die
 	export DISTRIBUTION_PATCHES="gentoo_patches//openjdk-8-hotspot-arrayallocator.patch"
+	DISTRIBUTION_PATCHES+=" gentoo_patches//openjdk-8-make-4.4.patch"
 
 	# For bootstrap builds as the sandbox control file might not yet exist.
 	addpredict /proc/self/coredump_filter #nowarn