Use more secure HTTPS URLs for coreboot sites

The coreboot sites support HTTPS, and requests over HTTP with SSL are
also redirected. So use the more secure URLs, which also saves a
request most of the times, as nothing needs to be redirected.

Run the command below to replace all occurences.

```
$ git grep -l -E 'http://(www.|review.|)coreboot.org'
| xargs sed -i 's,http://\(.*\)coreboot.org,https://\1coreboot.org,g'
```

Change-Id: If53f8b66f1ac72fb1a38fa392b26eade9963c369
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://review.coreboot.org/20034
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

Documentation/CorebootBuildingGuide.tex

@@ -116,15 +116,15 @@ The latest coreboot sources are available via GIT.
 For users who doesn't need to change and commit the code:
 { \small
 \begin{verbatim}
-$ git clone http://review.coreboot.org/p/coreboot
+$ git clone https://review.coreboot.org/p/coreboot
 \end{verbatim}
 }
 For developers, you need to get a gerrit account which you can register
-at \url{http://review.coreboot.org}. Please refer section ~\ref{sec:gerrit}
+at \url{https://review.coreboot.org}. Please refer section ~\ref{sec:gerrit}
 { \small
 \begin{verbatim}
 $ git clone ssh://<username>@review.coreboot.org:29418/coreboot
-$ git clone http://[<username>:<password>@]review.coreboot.org/coreboot.git
+$ git clone https://[<username>:<password>@]review.coreboot.org/coreboot.git
 \end{verbatim}
 }
 
@@ -463,7 +463,7 @@ Once your patch gets a +2 comment, your patch can be merged (cherry-pick, actual
 If you are a coreboot user, not planning to contribute, you can skip this section.
 \subsection{Get gerrit account}
 You need to get an OpenID first. Currently Google account give you an OpenID. It means, if you have a gmail account, you have an OpenID. You can try to signed in.
-click \url{http://review.coreboot.org}
+click \url{https://review.coreboot.org}
 
 %\includegraphics[width=6.00in,height=1.00in]{gerrit_signin.png}
 { \small
@@ -655,7 +655,7 @@ usage of Git.
 
 \begin{itemize}
  \item
- \textit{\url{http://www.coreboot.org/Documentation}}
+ \textit{\url{https://www.coreboot.org/Documentation}}
 \end{itemize}
 
 \subsection {Links}