labs/yocto-devtool: fix typos

Signed-off-by: Alexandre Belloni <[email protected]>

labs/yocto-devtool/yocto-devtool.tex

@@ -99,7 +99,7 @@ \section{Generate a new recipe}
 devtool deploy-target hello [email protected]
 \end{bashinput}
 
-This will send to the device all the file in the \code{image} subdirectory
+This will send to the device all the files in the \code{image} subdirectory
 of the recipe work directory, keeping the directory layout and file
 permissions. You can now test the program on the target:
 
@@ -244,7 +244,7 @@ \section{Modify a recipe}
 \end{bashinput}
 
 The generated git repository contains only one commit which contains
-thepristine sources as extracted from the downloaded tarball.  Now open the
+the pristine sources as extracted from the downloaded tarball.  Now open the
 \code{src/hello.c} with an editor, go around line 60 and edit the ``Hello,
 world'' string to print whatever you prefer. Save and exit the
 editor. Check your modification using \code{git diff -- src/hello.c} and