Merge pull request #5850 from smlng/pr/dist_fix_readme

minor typos in README corrected

dist/tools/tunslip/README.md

@@ -5,7 +5,7 @@ The module `gnrc_slip` (Serial line IP) enables the RIOT network stack to
 communicate IP packets over the serial interface. This collection of tools
 originally from Contiki [1] enables Linux to interpret this data. Though there
 is a tool for such operations on Linux (`slattach`) it is only able to handle
-IPv4 packages and is unnessarily complicated.
+IPv4 packages and is unnecessarily complicated.
 
 # Installation
 Just install them using

dist/tools/vagrant/README.md

@@ -5,7 +5,7 @@
 This repository includes a [Vagrantfile](https://github.com/RIOT-OS/RIOT/blob/master/Vagrantfile)
 to create and control a Linux virtual machine based on an Ubuntu 16.04 (64-bit) image that contains
 all necessary toolchains and dependencies to build and flash compatible devices with RIOT.
-The advantage of using this VM is to have a reproducable, portable and even disposable environment
+The advantage of using this VM is to have a reproducible, portable and even disposable environment
 that can be used to develop for RIOT with decreased setup times and without the requirement of
 making changes to the underlying host system.