gummiboot: build-sys: don't copy .eh_frame into final exe
gummiboot: build-sys: don't copy .eh_frame into final exe

Apparently some firmware implementations[1] won't run executables
containing an .eh_frame section, failing instead with "Error reported:
Unsupported" on the shell. There's also no obvious need for it, so
don't copy it.

[1] e.g., the one used on the ASRock C2750D4I

todorez/gummiboot-multiboot2,todorez/gummiboot-multiboot2,freedesktop-unofficial-mirror/gummiboot,aaronp24/gummiboot,miguelinux/gummiboot2systemd-boot,todorez/tummiboot,trilean/gummiboot,miguelinux/gummiboot2systemd-boot,trilean/gummiboot,todorez/tummiboot,freedesktop-unofficial-mirror/gummiboot,aaronp24/gummiboot