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>

toolchain/musl/patches/400-fix_quoted_timezone.patch

@@ -0,0 +1,11 @@
+--- a/src/time/__tz.c
++++ b/src/time/__tz.c
+@@ -87,7 +87,7 @@
+ 	int i;
+ 	if (**p == '<') {
+ 		++*p;
+-		for (i=0; **p!='>' && i<TZNAME_MAX; i++)
++		for (i=0; (*p)[i]!='>' && i<TZNAME_MAX; i++)
+ 			d[i] = (*p)[i];
+ 		++*p;
+ 	} else {