config.{gues,sub}: update

config: move the patch choice to the extract section

Choosing the origin of the patches to apply is best
done in the 'extract' section.

config: add fallback to patch order

Add the possibility to fallback to either bundled or local patches
if local or bundled are missing.

config: add the local,bundled patch order

This ordering first applies the local patches, then the bundeld ones.

config: make selecting the patch origin a choice rather than a bool

functions: do not over-detect error when patching

Merge.

tools wrapper: fix error due to unused argument

In the C wrapper, the argc argument is not used, causing an error
(as we treat warnings as errors). Use a dummy allocation to get
rid of the warning.

tools wrapper: correctly install the C wrapper

When building the C wrapper, specify the source file to be compiled.

config: move the "build shared libraries" option to the OS menu

The "Build shared libraries" config option is dependant on the type of
"Target OS".

Moving this options to the "Target OS" sub-menu is also better in the user
perspective: he/she no longer needs to go back and forth to see if he/she
missed any option.