Simplify the .gitignore file

Now that we always do out-of-tree builds (and the in-tree builds are
faked via a "build" directory), we can simplify out .gitignore file
quite a bit.

Message-Id: <20200909080305.258961-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

.gitignore

 /GNUmakefile
 /build/
-/.doctrees
-/config-devices.*
-/config-host.*
-/config-target.*
-/config.status
-/config-temp
-/tools/virtiofsd/50-qemu-virtiofsd.json
-/elf2dmp
-/trace-events-all
-/trace/generated-events.h
-/trace/generated-events.c
-/trace/generated-helpers-wrappers.h
-/trace/generated-helpers.h
-/trace/generated-helpers.c
-/trace/generated-tcg-tracers.h
-/ui/shader/texture-blit-frag.h
-/ui/shader/texture-blit-vert.h
-/ui/shader/texture-blit-flip-vert.h
-/ui/input-keymap-*.c.inc
-*-timestamp
-/*-softmmu
-/*-darwin-user
-/*-linux-user
-/*-bsd-user
-/ivshmem-client
-/ivshmem-server
-/libdis*
-/libuser
-/linux-headers/asm
-/qga/qapi-generated
-/qapi-gen-timestamp
-/qapi/qapi-builtin-types.[ch]
-/qapi/qapi-builtin-visit.[ch]
-/qapi/qapi-commands-*.[ch]
-**/qapi/qapi-commands.[ch]
-**/qapi/qapi-emit-events.[ch]
-/qapi/qapi-events-*.[ch]
-**/qapi/qapi-events.[ch]
-**/qapi/qapi-init-commands.[ch]
-**/qapi/qapi-introspect.[ch]
-/qapi/qapi-types-*.[ch]
-**/qapi/qapi-types.[ch]
-/qapi/qapi-visit-*.[ch]
-!/qapi/qapi-visit-core.c
-**/qapi/qapi-visit.[ch]
-**/qapi/qapi-doc.texi
-/qemu-edid
-/qemu-img
-/qemu-nbd
-/qemu-options.def
-/qemu-options.texi
-/qemu-img-cmds.texi
-/qemu-img-cmds.h
-/qemu-io
-/qemu-ga
-/qemu-bridge-helper
-/qemu-keymap
-/qemu-monitor.texi
-/qemu-monitor-info.texi
-/qemu-storage-daemon
-/qemu-version.h
-/qemu-version.h.tmp
-/module_block.h
-/scsi/qemu-pr-helper
-/vhost-user-scsi
-/vhost-user-blk
-/vhost-user-gpu
-/vhost-user-input
-/fsdev/virtfs-proxy-helper
-*.tmp
-*.[1-9]
-*.a
-*.aux
-*.cp
-*.exe
-*.msi
-*.dll
-*.so
-*.fn
-*.ky
-*.log
-*.pdf
-*.pod
-*.cps
-*.fns
-*.kys
-*.pg
-*.pyc
-*.toc
-*.tp
-*.vr
-*.d
-!/.gitlab-ci.d
-!/scripts/qemu-guest-agent/fsfreeze-hook.d
-*.o
 .sdk
-*.gcda
-*.gcno
-*.gcov
-/pc-bios/bios-pq/status
-/pc-bios/edk2-*.fd
-/pc-bios/vgabios-pq/status
-/pc-bios/optionrom/linuxboot.asm
-/pc-bios/optionrom/linuxboot.bin
-/pc-bios/optionrom/linuxboot.raw
-/pc-bios/optionrom/linuxboot.img
-/pc-bios/optionrom/linuxboot_dma.asm
-/pc-bios/optionrom/linuxboot_dma.bin
-/pc-bios/optionrom/linuxboot_dma.raw
-/pc-bios/optionrom/linuxboot_dma.img
-/pc-bios/optionrom/pvh.asm
-/pc-bios/optionrom/pvh.bin
-/pc-bios/optionrom/pvh.raw
-/pc-bios/optionrom/pvh.img
-/pc-bios/optionrom/multiboot.asm
-/pc-bios/optionrom/multiboot.bin
-/pc-bios/optionrom/multiboot.raw
-/pc-bios/optionrom/multiboot.img
-/pc-bios/optionrom/kvmvapic.asm
-/pc-bios/optionrom/kvmvapic.bin
-/pc-bios/optionrom/kvmvapic.raw
-/pc-bios/optionrom/kvmvapic.img
-/pc-bios/s390-ccw/s390-ccw.elf
-/pc-bios/s390-ccw/s390-ccw.img
-/docs/built
-/docs/interop/qemu-ga-qapi.texi
-/docs/interop/qemu-ga-ref.html
-/docs/interop/qemu-ga-ref.info*
-/docs/interop/qemu-ga-ref.txt
-/docs/interop/qemu-qmp-qapi.texi
-/docs/interop/qemu-qmp-ref.html
-/docs/interop/qemu-qmp-ref.info*
-/docs/interop/qemu-qmp-ref.txt
-/docs/version.texi
-/contrib/vhost-user-gpu/50-qemu-gpu.json
-*.tps
 .stgit-*
 .git-submodule-status
 cscope.*
 tags
 TAGS
-docker-src.*
 *~
 *.ast_raw
 *.depend_raw
-trace.c
-trace-ust.h
-trace-ust.h
-trace-dtrace.h
-trace-dtrace.dtrace
-trace-root.h
-trace-root.c
-trace-ust-root.h
-trace-ust-root.h
-trace-ust-all.h
-trace-ust-all.c
-trace-dtrace-root.h
-trace-dtrace-root.dtrace
-trace-ust-all.h
-trace-ust-all.c
-/target/arm/decode-sve.c.inc