devel/gnu-efi: update to v3.0.9

• adopt the port;
• added eficompiler.h to pkg-plist;
• USE_GCC=yes became USES=compiler:c++11-lib;
• kept ONLY_FOR_ARCHS as is.

PR: 231032
Approved by: rene (mentor)
Differential Revision: https://reviews.freebsd.org/D17887