The initrd-recovery package is script only package, and it can be
used widely for embedded boards, so there is no reason not to
build in aarch64. Enable aarch64 build.
Change-Id: I81e235879095fd5495d23ac58d64f9f47fb2d5c9 Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>