Provide unprefixed symbols, e.g. libintl_dgettext -> dgettext
https://savannah.gnu.org/bugs/index.php?64323

Fix build failure with "make -j"
https://git.savannah.gnu.org/gitweb/?p=gettext.git;a=commit;h=97a6a63ad61949663283f5fad68c9d5fb9be1f15

Index: gettext-runtime/intl/Makefile.in
--- gettext-runtime/intl/Makefile.in.orig
+++ gettext-runtime/intl/Makefile.in
@@ -1692,7 +1692,7 @@ SUFFIXES = 
 AM_CPPFLAGS = -Ignulib-lib -I$(srcdir)/gnulib-lib \
 	-DLOCALEDIR=$(localedir_c_make) \
 	-DLOCALE_ALIAS_PATH=\"$(aliaspath)\" -DLIBDIR=\"$(libdir)\" \
-	-DBUILDING_LIBINTL $(am__append_1)
+	-DBUILDING_LIBINTL -DBUILDING_DLL $(am__append_1)
 
 # Enable more warning options in this directory.
 
@@ -2601,8 +2601,8 @@ dngettext.lo:        ../config.h $(srcdir)/gettextP.h 
 ngettext.lo:         ../config.h $(srcdir)/gettextP.h libgnuintl.h $(srcdir)/gmo.h $(srcdir)/loadinfo.h
 plural.lo:           ../config.h $(srcdir)/plural-exp.h $(PLURAL_DEPS)
 plural-exp.lo:       ../config.h $(srcdir)/plural-exp.h
-langprefs.lo:        ../config.h
-log.lo:              ../config.h
+langprefs.lo:        ../config.h $(srcdir)/gettextP.h libgnuintl.h $(srcdir)/gmo.h $(srcdir)/loadinfo.h
+log.lo:              ../config.h $(srcdir)/gettextP.h libgnuintl.h $(srcdir)/gmo.h $(srcdir)/loadinfo.h
 printf.lo:           ../config.h
 setlocale.lo:        ../config.h $(srcdir)/gettextP.h libgnuintl.h $(srcdir)/gmo.h $(srcdir)/loadinfo.h
 version.lo:          ../config.h libgnuintl.h