tools/7z: cleanup Makefile

Define the version in one variable,
and use Make functions to use variations of it elsewhere.

Correct the CPE ID.

Override the default tar directory flag
by adding a new value to the tar options
instead of defining the entire command.

Use variables for adjusting build recipes
instead of adding custom build recipes.

Remove unnecessary lines and add spacing.

Signed-off-by: Michael Pratt <mcpratt@pm.me>
Link: https://github.com/openwrt/openwrt/pull/15991
Signed-off-by: Robert Marko <robimarko@gmail.com>

tools/7z/Makefile

@@ -2,32 +2,26 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=7z
 PKG_VERSION:=23.01
-PKG_SOURCE_VERSION:=2301
 
-PKG_SOURCE:=$(PKG_NAME)$(PKG_SOURCE_VERSION)-src.tar.xz
+PKG_SOURCE:=$(PKG_NAME)$(subst .,,$(PKG_VERSION))-src.tar.xz
 PKG_SOURCE_URL:=https://7-zip.org/a/
 PKG_HASH:=356071007360e5a1824d9904993e8b2480b51b570e8c9faf7c0f58ebe4bf9f74
-PKG_CPE_ID:=cpe:/a:7-zip:7zip
+
+PKG_CPE_ID:=cpe:/a:7-zip:7-zip
 
 # This builds the 7zr variant which supports only 7z, so no non-LGPL code should be included
 PKG_LICENSE:=LGPL-2.1-or-later
 PKG_LICENSE_FILES:=DOC/License.txt DOC/copying.txt
 
-HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/$(PKG_NAME)-$(PKG_VERSION)
+HOST_MAKE_PATH:=CPP/7zip/Bundles/Alone7z
 
 include $(INCLUDE_DIR)/host-build.mk
 
-TAR_CMD=$(HOST_TAR) -C $(1) $(TAR_OPTIONS)
-
-ALONE_DIR=$(HOST_BUILD_DIR)/CPP/7zip/Bundles/Alone7z
-
-define Host/Compile
-	$(MAKE) -C $(ALONE_DIR) -f makefile.gcc
-endef
+TAR_OPTIONS := -C $(HOST_BUILD_DIR) $(TAR_OPTIONS)
+HOST_MAKE_FLAGS += -f makefile.gcc
 
 define Host/Install
-	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin
-	$(INSTALL_BIN) $(ALONE_DIR)/_o/7zr $(STAGING_DIR_HOST)/bin/7zr
+	$(INSTALL_BIN) $(HOST_BUILD_DIR)/$(HOST_MAKE_PATH)/_o/7zr $(STAGING_DIR_HOST)/bin/
 endef
 
 define Host/Clean