sdk-manual: working-projects: properly highlight code code-blocks

There are some blocks containing C code so highlight them as C with the
"c" lexer.

For autotool'ed files, there's no lexer available so "none" will do just
fine.

Finally, there's one Makefile code block so highlight it with the
"makefile" lexer.

(From yocto-docs rev: 6c3802113231393ff02d8ac96418f59cfc4c0124)

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit 10d40604cb4affb17dda2253f82a2422d5a9bcf6)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/sdk-manual/working-projects.rst

@@ -56,7 +56,9 @@ project:
    Create the remaining
    three files as follows:
 
-   -  ``hello.c``::
+   -  ``hello.c``:
+
+      .. code-block:: c
 
          #include <stdio.h>
 
@@ -66,7 +68,9 @@ project:
                  return 0;
              }
 
-   -  ``configure.ac``::
+   -  ``configure.ac``:
+
+      .. code-block:: none
 
          AC_INIT(hello,0.1)
          AM_INIT_AUTOMAKE([foreign])
@@ -74,7 +78,9 @@ project:
          AC_CONFIG_FILES(Makefile)
          AC_OUTPUT
 
-   -  ``Makefile.am``::
+   -  ``Makefile.am``:
+
+      .. code-block:: none
 
          bin_PROGRAMS = hello
          hello_SOURCES = hello.c
@@ -271,7 +277,9 @@ example:
 
    Create the three files as follows:
 
-   -  ``main.c``::
+   -  ``main.c``:
+
+      .. code-block:: c
 
          #include "module.h"
          void sample_func();
@@ -281,12 +289,16 @@ example:
              return 0;
          }
 
-   -  ``module.h``::
+   -  ``module.h``:
+
+      .. code-block:: c
 
          #include <stdio.h>
          void sample_func();
 
-   -  ``module.c``::
+   -  ``module.c``:
+
+      .. code-block:: c
 
          #include "module.h"
          void sample_func()
@@ -321,7 +333,9 @@ example:
    two lines that can be used to set the :term:`CC` variable. One line is
    identical to the value that is set when you run the SDK environment
    setup script, and the other line sets :term:`CC` to "gcc", the default
-   GNU compiler on the build host::
+   GNU compiler on the build host:
+
+   .. code-block:: Makefile
 
       # CC=i586-poky-linux-gcc -m32 -march=i586 --sysroot=/opt/poky/2.5/sysroots/i586-poky-linux
       # CC="gcc"