Revert "Fixed compilation with GCC 4.9."

The final release doesn't have the issue with non-explicit default
std::vector constructor.

This reverts commit 05386e887a993e30d95c95dd62d856fd4a5c5f2c.

Conflicts:
	src/Utility/Directory.cpp
package: removed GCC 4.9 PKGBUILD.

Useless now, as 4.9 is in the repo.