Added gold target to build ld.gold; binunil tests now need extra RAM - added 1GB swap

Makefile

 all:
+	dd if=/dev/zero of=swap bs=1048576 count=1024
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+
 	tar xf binutils-2.34.tar.xz
 	mkdir binutils-build
 	cd binutils-build && CC="gcc -isystem /usr/include" LDFLAGS="-Wl,-rpath-link,/usr/lib:/lib" ../binutils-2.34/configure --build=$(CLFS_TARGET) --prefix=/usr --enable-shared --enable-plugins
@@ -10,3 +15,27 @@ all:
 	$(MAKE) -C binutils-build tooldir=/usr install
 	rm -rf binutils-2.34
 	rm -rf binutils-build
+
+	swapoff swap
+	rm -rf swap
+
+gold:
+	dd if=/dev/zero of=swap bs=1048576 count=1024
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+
+	tar xf binutils-2.34.tar.xz
+	mkdir binutils-build
+	cd binutils-build && CC="gcc -isystem /usr/include" LDFLAGS="-Wl,-rpath-link,/usr/lib:/lib" ../binutils-2.34/configure --prefix=/usr --enable-gold --enable-ld=default --enable-plugins --enable-shared
+	$(MAKE) -C binutils-build tooldir=/usr
+# FIXME: binutils tests fail on ARMv7, we should exclude tests which are known to fail and beyond our control
+	-if [[ ! "$(BUILD_OPTIONS)" =~ no-tests ]] ; then \
+	    $(MAKE) -C binutils-build -k check ; \
+	fi
+	$(MAKE) -C binutils-build tooldir=/usr install
+	rm -rf binutils-2.34
+	rm -rf binutils-build
+
+	swapoff swap
+	rm -rf swap