pmb/parse/_apkbuild: wrap more calls in try-catch
Otherwise pmb crashes on some APKBUILDs, for example:
source="https://files.pythonhosted.org/packages/source/{_pyname%
{_pyname#?}}/_pyname/
_pyname-$pkgver.tar.gz"
Otherwise pmb crashes on some APKBUILDs, for example:
source="https://files.pythonhosted.org/packages/source/{_pyname%
{_pyname#?}}/_pyname/
_pyname-$pkgver.tar.gz"