lkmc v2-rc

Unsquashed version at v2-rc-unsquashed, but that cannot be merged as it
breaks bisects at several points. All bugs will not bisect to this
humongous change.

It all started with a conversion of the Bash scripts to Python, mainly
because I couldn't stand not being able to properly use --options for
run which has a million options.

Then since that required a full testing, I decided to do all the
refactorings that I had in mind at once, and so I did and it became
v2-rc.

This is the largest patch I have ever done! OMG a few weeks of extra time.
I'm never writing a Bash script for anything that starts getting big again.

Some of the features are:

* separate build-qemu and build-gem5 commands
* common: convert scripts to python. Add --option for everything
* rename build to build-buildroot now that we are splitting all the build
  commands, Linux kernel to follow
* move all git submodules to submodules/ and all buildroot packages to
  packages/
* refactor the out/ structure. Keep projects on toplevel, because guest
  projects separate archs and host ones don't, making a toplevel arch wrong
* do-release: rename to just release
  https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it
* run: add --terminal and explain gem5 pdb
* just track the lvimrc
* store CLI kernel config fragment inside buildlroot to avoid conflicts
* gem5: document m5 initparam
* readme: make a bunch of things awesomer
* readme: fix broken refs
* parsec-benchmark: update to 75d55ac446a43c47efb1044844a108c6c330184c
  Could not fetch otherwise.
* gem5: M5_OVERRIDE_PY_SOURCE

buildroot_config/default

@@ -0,0 +1,65 @@
+# Toolchain options.
+# Enable as much visibility as possible.
+BR2_CCACHE=y
+BR2_CCACHE_USE_BASEDIR=n
+BR2_DEBUG_3=y
+BR2_ENABLE_DEBUG=y
+BR2_GCC_ENABLE_GRAPHITE=y
+BR2_GCC_ENABLE_LTO=y
+BR2_GCC_ENABLE_OPENMP=y
+BR2_OPTIMIZE_0=y
+BR2_PTHREAD_DEBUG=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_TOOLCHAIN_BUILDROOT_FORTRAN=y
+BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
+
+# Rootfs
+BR2_TARGET_ROOTFS_CPIO=n
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_INITRAMFS=n
+BR2_TARGET_ROOTFS_EXT2_SIZE="512M"
+
+# Host GDB
+BR2_GDB_VERSION="7.11.1"
+BR2_GDB_VERSION_7_10=n
+BR2_GDB_VERSION_7_11=y
+BR2_GDB_VERSION_7_12=n
+BR2_PACKAGE_HOST_GDB=y
+BR2_PACKAGE_HOST_GDB_PYTHON=y
+BR2_PACKAGE_HOST_GDB_SIM=y
+BR2_PACKAGE_HOST_GDB_TUI=y
+
+# Custom packages
+# Keepding those in because we control them fully
+# and know for sure that are small.
+BR2_PACKAGE_KERNEL_MODULES=y
+BR2_SAMPLE_PACKAGE=y
+
+# We were tempted to do this to disable S40network neatly,
+# but that package also creates extra configuration files
+# such as /etc/network/interfaces which we need. So we just
+# remove the init.d file for now.
+#BR2_PACKAGE_IFUPDOWN_SCRIPTS=n
+
+# misc packages
+BR2_PACKAGE_DHRYSTONE=y
+BR2_PACKAGE_FILE=y
+BR2_PACKAGE_PCIUTILS=y
+BR2_PACKAGE_STRACE=y
+
+# lscpu: TODO not installing?
+BR2_PACKAGE_UTIL_LINUX=y
+BR2_PACKAGE_UTIL_LINUX_BINARIES=y
+# taskset
+BR2_PACKAGE_UTIL_LINUX_SCHEDUTILS=y
+
+# gdbserver
+BR2_PACKAGE_GDB=y
+
+# ftrace
+BR2_PACKAGE_TRACE_CMD=y
+
+# DTC
+BR2_PACKAGE_DTC=y
+BR2_PACKAGE_DTC_PROGRAMS=y
+BR2_PACKAGE_HOST_DTC=y

buildroot_config/gpio

@@ -0,0 +1,2 @@
+BR2_PACKAGE_LINUX_TOOLS=y
+BR2_PACKAGE_LINUX_TOOLS_GPIO=y

buildroot_config/kmscube

@@ -0,0 +1,10 @@
+BR2_PACKAGE_KMSCUBE=y
+BR2_PACKAGE_MESA3D=y
+BR2_PACKAGE_MESA3D_OPENGL_EGL=y
+BR2_PACKAGE_MESA3D_OPENGL_ES=y
+
+# Software rasteriser.
+# Selects the following chain:
+# BR2_PACKAGE_MESA3D_DRIVER=y
+# BR2_PACKAGE_MESA3D_DRI_DRIVER=y
+BR2_PACKAGE_MESA3D_DRI_DRIVER_SWRAST=y

buildroot_config/x11

@@ -0,0 +1,15 @@
+BR2_PACKAGE_XAPP_TWM=y
+BR2_PACKAGE_XAPP_XCALC=y
+BR2_PACKAGE_XAPP_XCLOCK=y
+BR2_PACKAGE_XAPP_XEYES=y
+BR2_PACKAGE_XAPP_XINIT=y
+BR2_PACKAGE_XDRIVER_XF86_INPUT_KEYBOARD=y
+BR2_PACKAGE_XDRIVER_XF86_INPUT_MOUSE=y
+BR2_PACKAGE_XDRIVER_XF86_VIDEO_CIRRUS=y
+BR2_PACKAGE_XDRIVER_XF86_VIDEO_FBDEV=y
+BR2_PACKAGE_XDRIVER_XF86_VIDEO_VESA=y
+BR2_PACKAGE_XORG7=y
+BR2_PACKAGE_XSERVER_XORG_SERVER=y
+BR2_PACKAGE_XTERM=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_TOOLCHAIN_BUILDROOT_WCHAR=y