Fix permissions when using the PearBinaryInstaller
Fix permissions when using the PearBinaryInstaller

The PearBinaryInstaller is old and not used by many people, so the
world writable permissions weren't caught

floverdevel/composer,vdm-io/composer,pierredup/composer,alcohol/composer,milleruk/composer,stefangr/composer,naderman/composer,composer/composer,johnstevenson/composer,stof/composer,staabm/composer,dzuelke/composer,nicolas-grekas/composer,fabpot/composer,localheinz/composer,slbmeh/composer,andrerom/composer