devel/fb-adb: unbreak c6_64 build after r411857

> Extracting for fb-adb-1.4.4.124

> SHA256 Checksum OK for android-ndk-r10e-linux-x86_64.bin.

> SHA256 Checksum OK for facebook-fb-adb-1.4.4-124-gb230619_GH0.tar.gz.

tar: Error opening archive: Unrecognized archive format

• Error code 1