Hi. This is my test approach to allow redefinition of patch application in old
plain spec files. All references with
```
%patch1 -p1
%patch2 -p1
```
etc. cannot be redefined. There is quite nice %apply_patch macro and
%autopatch, which allows applying all patches in automated way.
Moves single %patchX from RPM code to macros. This can be then
redefined.
Similar to apply_patch, but allows all custom flags that can be passed
to %__patch utility. Forwards also name and number of a patch.
Rename to __apply_patchx_{common,plain,uncompress}
Use single macro in two variants,
