Cheatsheet update for Yocto 2.1 SDK

The how to create an SDK section describes how to do it for Yocto 1.8
There was a simple version change needed to make it 2.1

Change-Id: I193131ecadaa4423c10df3cd418f2e143d17e2f9
Signed-off-by: Chris Austen <austenc@us.ibm.com>
diff --git a/cheatsheet.md b/cheatsheet.md
index 8909da8..e617608 100644
--- a/cheatsheet.md
+++ b/cheatsheet.md
@@ -48,11 +48,11 @@
 Looking for a way to compile your programs for 'ARM' but you happen to be running on a 'PPC' or 'x86' system?  You can build the sdk receive a fakeroot environment.  
 ```
 $ bitbake -c populate_sdk obmc-phosphor-image
-$ ./tmp/deploy/sdk/openbmc-phosphor-glibc-x86_64-obmc-phosphor-image-armv5e-toolchain-1.8+snapshot.sh
+$ ./tmp/deploy/sdk/openbmc-phosphor-glibc-x86_64-obmc-phosphor-image-armv5e-toolchain-2.1.sh
 ```
 Follow the prompts.  After it has been installed the default to setup your env will be similar to this command
 ```
-. /opt/openbmc-phosphor/1.8+snapshot/environment-setup-armv5e-openbmc-linux-gnueabi
+. /opt/openbmc-phosphor/2.1/environment-setup-armv5e-openbmc-linux-gnueabi
 ```
 
 ## Rebuilds & Reconfiguration