Generate pkgconfig file from d/rules, upstream doesn't do it

debian/rules

@@ -16,3 +16,8 @@ export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 override_dh_auto_configure:
 	dh_auto_configure -- \
     -DSTLINK_UDEV_RULES_DIR='/lib/udev/rules.d'
+
+override_dh_auto_install:
+	dh_auto_install
+	mkdir -p $(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)/pkgconfig
+	sed -e "s/@VERSION@/$(DEB_VERSION_UPSTREAM)/" -e "s/@DEB_HOST_MULTIARCH@/$(DEB_HOST_MULTIARCH)/" $(CURDIR)/debian/stlink.pc.in > $(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)/pkgconfig/stlink.pc

debian/stlink.pc.in

@@ -0,0 +1,10 @@
+prefix=/usr
+includedir=${prefix}/include/stlink
+libdir=${prefix}/lib/@DEB_HOST_MULTIARCH@
+
+Name: stlink
+Description: Open source version of the STMicroelectronics Stlink Tools
+Version: @VERSION@
+Requires: libusb-1.0
+Libs: -L${libdir} -lstlink
+Cflags: -I${includedir}