linux-lg-hammerhead: use hammerhead/4.16/postmarketos-linux-qcom branch

* from github.com/shr-distribution/linux.git with both patches
  already applied on top of postmarketos-linux-qcom branch
* fixes:
ERROR: linux-lg-hammerhead-4.17+gitrAUTOINC+e9fc9b4e4a-r0 do_patch: Fuzz detected:

Applying patch 0002-Add-ramconsole.patch
patching file drivers/android/Kconfig
Hunk #1 succeeded at 8 with fuzz 1.
patching file drivers/android/Makefile
Hunk #1 succeeded at 2 with fuzz 1 (offset -1 lines).
patching file drivers/android/persistent_ram.c
patching file drivers/android/persistent_ram.h
patching file drivers/android/ram_console.c
patching file drivers/android/ram_console.h

The context lines in the patches can be updated with devtool:

    devtool modify linux-lg-hammerhead
    devtool finish --force-patch-refresh linux-lg-hammerhead <layer_path>

Don't forget to review changes done by devtool!

ERROR: linux-lg-hammerhead-4.17+gitrAUTOINC+e9fc9b4e4a-r0 do_patch: QA Issue: Patch log indicates that patches do not apply cleanly. [patch-fuzz]

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>