generate debiandencies for libapt-pkg-dev automatically via deb-substvars

debian/control

@@ -52,7 +52,7 @@ Description: Documentation for APT
 Package: libapt-pkg-dev
 Architecture: any
 Priority: optional
-Depends: libapt-pkg4.10 (= ${binary:Version}), libapt-inst1.2 (= ${binary:Version}), ${misc:Depends}, zlib1g-dev | zlib-dev
+Depends: ${libapt-pkg-name} (= ${binary:Version}), ${libapt-inst-name} (= ${binary:Version}), ${misc:Depends}, zlib1g-dev | zlib-dev
 Section: libdevel
 Description: Development files for APT's libapt-pkg and libapt-inst
  This package contains the header files and libraries for

debian/rules

@@ -230,7 +230,7 @@ libapt-pkg-dev: build
 	dh_compress -p$@
 	dh_fixperms -p$@
 	dh_installdeb -p$@
-	dh_gencontrol -p$@
+	dh_gencontrol -p$@ -Vlibapt-pkg-name=$(LIBAPT_PKG) -Vlibapt-inst-name=$(LIBAPT_INST)
 	dh_md5sums -p$@
 	dh_builddeb -p$@