ddrescue: fix target build

ddrescue is not an autotools package. Convert to generic package to make
it build correctly for target architecture.

Cc: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ddrescue/ddrescue.mk

@@ -16,4 +16,20 @@ define DDRESCUE_EXTRACT_CMDS
 		tar --strip-components=1 -C $(@D) $(TAR_OPTIONS) -
 endef
 
-$(eval $(autotools-package))
+define DDRESCUE_CONFIGURE_CMDS
+	(cd $(@D); \
+		$(TARGET_MAKE_ENV) ./configure \
+		--prefix=/usr \
+		$(TARGET_CONFIGURE_OPTS) \
+	)
+endef
+
+define DDRESCUE_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)
+endef
+
+define DDRESCUE_INSTALL_TARGET_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) DESTDIR="$(TARGET_DIR)" install
+endef
+
+$(eval $(generic-package))