update: Go language from 1.3 to 1.4.2

toolset/setup/linux/languages/go.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
 
-RETCODE=$(fw_exists ${IROOT}/go1.3.installed)
+RETCODE=$(fw_exists ${IROOT}/go1.4.2.installed)
 [ ! "$RETCODE" == 0 ] || { return 0; }
 
-fw_get https://storage.googleapis.com/golang/go1.3.linux-amd64.tar.gz
-fw_untar go1.3.linux-amd64.tar.gz
+fw_get https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz
+fw_untar go1.4.2.linux-amd64.tar.gz
 
-touch ${IROOT}/go1.3.installed
+touch ${IROOT}/go1.4.2.installed