build: Remove redundant localedir and pkgconfdir initializations

These variables are handled by autoconf, and there's no need to set them
ourselves.

dpkg-deb/Makefile.am

 ## Process this file with automake to produce Makefile.in
 
-localedir = $(datadir)/locale
 AM_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-idirafter $(top_srcdir)/lib/compat \

dpkg-split/Makefile.am

 ## Process this file with automake to produce Makefile.in
 
-localedir = $(datadir)/locale
 AM_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-DADMINDIR=\"$(admindir)\" \

dselect/Makefile.am

@@ -2,9 +2,6 @@
 
 SUBDIRS = methods po
 
-localedir = $(datadir)/locale
-pkgconfdir = $(sysconfdir)/@PACKAGE@
-
 AM_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-DADMINDIR=\"$(admindir)\" \

lib/dpkg/Makefile.am

@@ -2,8 +2,6 @@
 
 SUBDIRS = . t
 
-localedir = $(datadir)/locale
-pkgconfdir = $(sysconfdir)/@PACKAGE@
 AM_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-DCONFIGDIR=\"$(pkgconfdir)\" \

src/Makefile.am

 ## Process this file with automake to produce Makefile.in
 
-localedir = $(datadir)/locale
-pkgconfdir = $(sysconfdir)/@PACKAGE@
-
 AM_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-DADMINDIR=\"$(admindir)\" \

utils/Makefile.am

 ## Process this file with automake to produce Makefile.in
 
-localedir = $(datadir)/locale
 AM_CPPFLAGS = \
 	-DADMINDIR=\"$(admindir)\" \
 	-DLOCALEDIR=\"$(localedir)\" \