[PATCH] doc: source-builder.txt: Update installtion for ubuntu packages

[Punit Vara]

        This patch fixes the most common python missing error for RTEMS
	tool chain build and RSB built is tested for ubuntu 16.04.1 LTS
---
 doc/source-builder.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/source-builder.txt b/doc/source-builder.txt
index 43bcf77..8b0cd89 100644
--- a/doc/source-builder.txt
+++ b/doc/source-builder.txt
@@ -3098,11 +3098,12 @@ home directory as recommended and end up on the SD card.
 Ubuntu
 ^^^^^^
 
-The latest testing was with Ubuntu 13.10 64bit. This section also includes Xubuntu. A
+The latest testing was with Ubuntu 16.04.1 LTS 64bit. This section also includes Xubuntu. A
 minimal installation was used and the following packages installed.
 
 -------------------------------------------------------------
-$ sudo apt-get build-dep binutils gcc g++ gdb unzip git python2.7-dev
+$ sudo apt-get build-dep binutils gcc g++ gdb unzip git
+$ sudo apt-get install python2.7-dev
 -------------------------------------------------------------
 
 FreeBSD
-- 
2.7.4