Updated go to 1.12.6

Makefile

 current_dir := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 temporary:
-	tar xf go1.8.7.src.tar.gz
-# FIXME: go tests failure! Cannot successfully complete all.bash
+	dd if=/dev/zero of=swap bs=1048576 count=1024
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+	mkdir -p /tmp/gocache
+	tar xf go1.12.6.src.tar.gz
 	if [ "$(HOSTTYPE)" = "aarch64" ]; then \
 	    tar xf go-linux-arm64-bootstrap.tbz ; \
-	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-arm64-bootstrap ./make.bash ; \
+	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-arm64-bootstrap GOCACHE=/tmp/gocache ./all.bash ; \
 	    rm -rf $(current_dir)go-linux-arm64-bootstrap ; \
 	elif [ "$(HOSTTYPE)" = "x86_64" ]; then \
 	    tar xf go-linux-amd64-bootstrap.tbz ; \
 	    ln -s /lib /lib64 ; \
-	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-amd64-bootstrap ./make.bash ; \
+	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-amd64-bootstrap GOCACHE=/tmp/gocache ./all.bash ; \
 	    rm -rf /lib64 ; \
 	    rm -rf $(current_dir)go-linux-amd64-bootstrap ; \
 	else \
 	    tar xf go-linux-arm-bootstrap.tbz ; \
-	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-arm-bootstrap ./make.bash ; \
+	    cd go/src && GOROOT_BOOTSTRAP=$(current_dir)go-linux-arm-bootstrap GOCACHE=/tmp/gocache ./all.bash ; \
 	    rm -rf $(current_dir)go-linux-arm-bootstrap ; \
 	fi
+	rm -rf /tmp/gocache
+	swapoff swap
+	rm -rf swap

build.xml

@@ -8,7 +8,7 @@
   <exec executable="./make.bash" dir="${makedir}/src"/>
   <move file="${builddir}/go" tofile="${builddir}/go1.4"/>
   <exec executable="tar" failonerror="true">
-   <arg line="xf ${basedir}/packages/go/go1.8.7.src.tar.gz -C ${builddir}"/>
+   <arg line="xf ${basedir}/packages/go/go1.12.6.src.tar.gz -C ${builddir}"/>
   </exec>
   <exec executable="./bootstrap.bash" dir="${makedir}/src">
    <env key="GOROOT_BOOTSTRAP" path="${builddir}/go1.4"/>