add kernel/.gitignore

hc

2024-08-16 a24a44ff9ca902811b99aa9663d697cf452e08ef

external/camera_engine_rkaiq/common/gen_mesh/android/genMesh_static_64bit/libgenMeshLib.a does not exist in tree 091a6a990842ffe8e9cc4b5a936157281d32f01b