sdk: invert logic for GIT_BRANCH and GIT_TAGNAME

There is currently a logic error with generating the base feed string.

In the scenario where the commit of a Tag match the latest commit of a
stable branch, the stable branch have priority over the tag name.

This results in generating SDK that actually target the branch instead
of the specific tag.

To fix this invert the logic and give priority to the tag name.

Fixes: #18583
(cherry picked from commit 289172b)
[ fix conflict error ]
Signed-off-by: Christian Marangi <[email protected]>

Author: Ansuel

target/sdk/Makefile

@@ -44,10 +44,10 @@ GIT_COMMIT:=$(shell git rev-parse HEAD 2>/dev/null)
 GIT_BRANCH:=$(filter-out master main HEAD,$(shell git rev-parse --abbrev-ref HEAD 2>/dev/null))
 GIT_TAGNAME:=$(shell git show-ref --tags --dereference 2>/dev/null | sed -ne '/^$(GIT_COMMIT) / { s|^.*/||; s|\^.*||; p }')
 
-BASE_FEED:=$(if $(GIT_URL),src-git-full base $(GIT_URL)$(if $(GIT_BRANCH),;$(GIT_BRANCH),$(if $(GIT_TAGNAME),;$(GIT_TAGNAME))))
+BASE_FEED:=$(if $(GIT_URL),src-git-full base $(GIT_URL)$(if $(GIT_TAGNAME),;$(GIT_TAGNAME),$(if $(GIT_BRANCH),;$(GIT_BRANCH))))
 BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),$(shell cd $(TOPDIR); LC_ALL=C git svn info 2>/dev/null | sed -ne 's/^URL: /src-gitsvn base /p'))
 BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),$(shell cd $(TOPDIR); LC_ALL=C svn info 2>/dev/null | sed -ne 's/^URL: /src-svn base /p'))
-BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),src-git-full base $(PROJECT_GIT)/openwrt/openwrt.git$(if $(GIT_BRANCH),;$(GIT_BRANCH),$(if $(GIT_TAGNAME),;$(GIT_TAGNAME))))
+BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),src-git-full base $(PROJECT_GIT)/openwrt/openwrt.git$(if $(GIT_TAGNAME),;$(GIT_TAGNAME),$(if $(GIT_BRANCH),;$(GIT_BRANCH))))
 
 KDIR_BASE = $(patsubst $(TOPDIR)/%,%,$(LINUX_DIR))
 KDIR_ARCHES = $(LINUX_KARCH)