fix graphite and LTO flags

Change-Id: Ia5f1fb9ba03bf00b4336f20b23f35d5077d365b2
scripts: fix .gnu.lto_* flood from linker

WARNING: vmlinux.o (.gnu.lto_page_cache_pipe_buf_release.b6e2886f74b88cb9): unexpected non-allocatable section.
Did you forget to use "ax"/"aw" in a .S file?
Note that for example <linux/init.h> contains
section definitions for use in .S files.

WARNING: vmlinux.o (.gnu.lto_spd_release_page.b6e2886f74b88cb9): unexpected non-allocatable section.
Did you forget to use "ax"/"aw" in a .S file?
Note that for example <linux/init.h> contains
section definitions for use in .S files.

WARNING: vmlinux.o (.gnu.lto_user_page_pipe_buf_steal.b6e2886f74b88cb9): unexpected non-allocatable section.
Did you forget to use "ax"/"aw" in a .S file?
Note that for example <linux/init.h> contains
section definitions for use in .S files.

etc.

Change-Id: Idf94282f08509621fc3eda26e94e80e6a23e8c01