Log Message:
Follow the recommended template for builtin.mk files: glibc's gettext
is _not_ GNU gettext, so it's presence should not set IS_BUILTIN.gettext
to "yes", but it _can_ set USE_BUILTIN.gettext to "yes" to \ 
force that
it be used.

Also, create a new variable BROKEN_GETTEXT_DETECTION, which is yes/no
depending on whether or not a package's GNU configure script properly
detects -lintl.  This variable currently defaults to "yes", but should
eventually be set to "no" and overridden on a package-by-package basis
for those packages that truly are broken.