Chapter 6.9 (glibc-2.5.1) gives an option to install just a couple of locales in order to achieve a full coverage of glibc tests.
When running gettext-0.16.1 testsuite at chapter 6.36 I noticed that the results were not the same as in the test results at LFS site (http://www.linuxfromscratch.org/lfs/build-logs/6.3/Pentium4-3Ghz/chapter06-tests/092-gettext), because 2 tests have been skipped.
This happened because the locale de_DE.UTF-8 need to be installed for these two tests run: gettext-5 and gettext-7.
This command solves the problem and I think should be metioned before the "make check" at chapter 6.36: localedef -i de_DE -f UTF-8 de_DE.UTF-8
I didn't built LFS-SVN, but this locale is not mentioned at glibc chapter and I compiled its gettext version (0.17) under LFS-6.3 system and the same thing happened.