musl: fix parsing of quoted time zone names

musl: fix parsing of quoted time zone names

fix parsing of the < > quoted time zone names. Compare the correct
character instead of repeatedly comparing the first character.

Patch has been submitted to upstream as
http://www.openwall.com/lists/musl/2016/10/24/3

Longer explanation in
http://www.openwall.com/lists/musl/2016/10/19/1

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
[Jo-Philipp Wich: move references into commit message, shorten title prefix]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>