[posix] remove ref to viper in 1.2, add ref to gcc

Author: sefau

posix/booklet/trampoline-labs.tex

@@ -91,7 +91,7 @@ \section{Setting up the environment}
 \begin{itemize}
   \item Trampoline RTOS and the \texttt{goil} configuration generator;
 
-  \item Viper, the virtual processor emulator that comes with Trampoline and send stimuli to Trampoline. Stimuli may be a periodic signal to simulate a timer overflow and use periodic tasks, or an aperiodic signal to simulate an external interrupt.
+  \item GNU development toolchain including a C compiler and linker (\texttt{gcc}), a debugger (\texttt{gdb}) and an implementation of standard C library (\texttt{glibc}).
 \end{itemize}
 
 Trampoline is installed in \unixcl{/opt/trampoline}. \texttt{goil} configuration generator is installed in \unixcl{/usr/local/bin}. All the usefull paths are set in the \unixcl{.profile} startup file of your account.