timezone data has been split into the package sys-libs/timezone-data

--- glibc-2.4/Makeconfig
+++ glibc-2.4/Makeconfig
@@ -931,7 +931,7 @@
 	      stdlib stdio-common libio malloc string wcsmbs time dirent    \
 	      grp pwd posix io termios resource misc socket sysvipc gmon    \
 	      gnulib iconv iconvdata wctype manual shadow gshadow po argp   \
-	      crypt nss localedata timezone rt conform debug		    \
+	      crypt nss localedata rt conform debug		    \
 	      $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)
 
 ifndef avoid-generated