d/control, d/tests: Use pkgconf in preference to pkg-config

debian/control

@@ -54,7 +54,7 @@ Build-Depends: dpkg-dev (>= 1.22.5), adwaita-icon-theme-full <!nocheck>,
                libxrandr-dev (>= 2:1.5.0),
                meson (>= 0.60.0),
                ninja-build,
-               pkg-config,
+               pkgconf,
                sassc,
                wayland-protocols (>= 1.17) [linux-any],
                xauth <!nocheck>,
@@ -175,7 +175,7 @@ Depends: gir1.2-gtk-3.0 (= ${binary:Version}),
          libxinerama-dev,
          libxkbcommon-dev,
          libxrandr-dev,
-         pkg-config,
+         pkgconf,
          wayland-protocols (>= 1.17) [linux-any],
          ${gir:Depends},
          ${misc:Depends},
@@ -294,7 +294,7 @@ Multi-Arch: same
 Section: libdevel
 Depends: libatk1.0-dev,
          libgail-3-0t64 (= ${binary:Version}),
-         pkg-config,
+         pkgconf,
          ${misc:Depends},
          libgtk-3-dev (= ${binary:Version})
 Suggests: libgail-3-doc

debian/tests/build

@@ -56,7 +56,7 @@ EOF
 
 # Deliberately word-splitting, that's how pkg-config works:
 # shellcheck disable=SC2046
-"${CROSS_COMPILE}gcc" -o gtktest gtktest.c $("${CROSS_COMPILE}pkg-config" --cflags --libs gtk+-3.0)
+"${CROSS_COMPILE}gcc" -o gtktest gtktest.c $("${CROSS_COMPILE}pkgconf" --cflags --libs gtk+-3.0)
 echo "build: OK"
 [ -x gtktest ]
 "${srcdir}"/debian/tests/run-with-display x11 \