exfat-utils: bump to version 1.1.0

Use gentoo distfiles since the download infra can't handle google docs
URLs.

[Peter: also pass TARGET_CFLAGS in CCFLAGS]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>