[openwrt/openwrt] sdk: filter out main on GIT_BRANCH parsing

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/0338dd44d5755fdd9bd38ce18e823cc024979240

commit 0338dd44d5755fdd9bd38ce18e823cc024979240
Author: Christian Marangi <ansuelsmth at gmail.com>
AuthorDate: Thu Dec 4 19:08:08 2025 +0100

    sdk: filter out main on GIT_BRANCH parsing
    
    Branch named main was never filter out on parsing the GIT_BRANCH define.
    
    Add main to the name of branch that should be filtered.
    
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 target/sdk/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/sdk/Makefile b/target/sdk/Makefile
index d2daa06902..0e91778238 100644
--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -41,7 +41,7 @@ SDK_DIRS = \
 GIT_URL:=$(shell git config --get remote.origin.url 2>/dev/null)
 GIT_URL:=$(if $(CONFIG_BUILDBOT),$(filter git://% http://% https://%,$(GIT_URL)),$(GIT_URL))
 GIT_COMMIT:=$(shell git rev-parse HEAD 2>/dev/null)
-GIT_BRANCH:=$(filter-out master HEAD,$(shell git rev-parse --abbrev-ref HEAD 2>/dev/null))
+GIT_BRANCH:=$(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 --root=package base $(GIT_URL)$(if $(GIT_BRANCH),;$(GIT_BRANCH),$(if $(GIT_TAGNAME),;$(GIT_TAGNAME))))