add python_compileall macro and use it in pyproject_install

[bnavigator]

• Closes Macros to compile files #9
• Closes %pyx_compile problems when only one flavour is enabled #35
• Closes Create macro for python compile with multiversion in mind. #41 (possibly)
• Restores the compilation for %pyproject_install removed by %pyproject_install macro should include --no-compile. #37

[bnavigator]

Suggested change

	%python_compileall \
	%{python_expand for d in %{buildroot}%{$python_sitelib} %{buildroot}%{$python_sitearch}; do \
	if [ -d $d ]; then \
	find $d -name '*.pyc' -delete; \
	$python -m compileall $d; \
	$python -O -m compileall $d; \
	fi; \
	done \
	} \
	%{nil}
	%python_compileall() \
	%{python_expand # \
	%if %# >= 1 \
	dirs="%{**}" \
	%else
	dirs="%{buildroot}%{$python_sitelib} %{buildroot}%{$python_sitearch}"
	%endif \
	for d in $dirs; do \
	if [ -d "$d" ]; then \
	find "$d" -name '*.pyc' -delete; \
	$python -m compileall "$d"; \
	$python -O -m compileall "$d"; \
	fi; \
	done \
	} \
	%{nil}

This would add optionally providing the directories (But wouldn't work with %{$python_*} because of the inner expand.

[mcepl]

Hmm, something’s wrong on Leap 15 ... https://is.gd/xyc8l7.

[bnavigator]

Fixed in #63. Sorry.