Add foundation for riscv architecture

riscv is new cool kid in town. This pull request enables base infrastructure to support riscv32 and riscv64 profiles full architecture and qemu port is in meta-riscv
https://github.com/kraj/meta-riscv

These changes are being rapidly upstreamed, eventually we might have a very thin layer

The following changes since commit abf2e9526a11bcb51b71b90a7b76bd33af656494:

systemd-serialtty: allow empty package (2017-09-26 11:07:36 +0100)

are available in the git repository at:

git://git.openembedded.org/openembedded-core-contrib kraj/riscv
http://cgit.openembedded.org/openembedded-core-contrib/log/?h=kraj/riscv

Khem Raj (10):
site: Add riscv32 and riscv64
insane: Add entries for riscv 32bit/64bit
siteinfo: Define data for riscv32 and riscv64 kernel-arch.bbclass: Add riscv to kernel arch map
runqemu: Add riscv support for qemu machines
binutils: Convert SRC_URI and SRCREV to weak defines
gcc: Backport fix for a segfault on riscv
gcc-runtime: Disable libitm on riscv
elfutils: Fix missing library on linker cmdline
openssl: Add support for riscv32/riscv64

 meta/classes/insane.bbclass                        |  4 ++
 meta/classes/kernel-arch.bbclass                   |  3 +-
 meta/classes/siteinfo.bbclass                      |  6 +++
 meta/recipes-connectivity/openssl/openssl10.inc    |  6 +++
 .../recipes-connectivity/openssl/openssl_1.1.0f.bb |  6 +++
 meta/recipes-devtools/binutils/binutils-2.29.inc   |  5 ++-
 meta/recipes-devtools/elfutils/elfutils_0.170.bb   |  1 +
 ...0001-libasm-may-link-with-libbz2-if-found.patch | 39 +++++++++++++++++
 meta/recipes-devtools/gcc/gcc-7.2.inc              |  1 +
 ...le-non-legitimate-address-in-riscv_legiti.patch | 50 ++++++++++++++++++++++
 meta/recipes-devtools/gcc/gcc-runtime.inc          |  2 +
 meta/site/riscv32-linux                            |  4 ++
 meta/site/riscv64-linux                            |  4 ++
 scripts/runqemu                                    |  4 ++
 14 files changed, 132 insertions(+), 3 deletions(-)
 create mode 100644 meta/recipes-devtools/elfutils/files/0001-libasm-may-link-with-libbz2-if-found.patch
 create mode 100644 meta/recipes-devtools/gcc/gcc-7.2/0050-RISC-V-Handle-non-legitimate-address-in-riscv_legiti.patch
 create mode 100644 meta/site/riscv32-linux
 create mode 100644 meta/site/riscv64-linux

2.14.2