Initial commit (Bazel version)

* Add Bazel build environment setup
* Kelvin startup asm and linker script
* A hello_world example

Change-Id: I7b3b246f1f22900d47475d0aa50204d2e174193a
diff --git a/.bazelrc b/.bazelrc
new file mode 100644
index 0000000..99fc0bd
--- /dev/null
+++ b/.bazelrc
@@ -0,0 +1,8 @@
+build --action_env=BAZEL_CXXOPTS="-std=gnu++14"
+build --cxxopt='-std=gnu++14'
+build --conlyopt='-std=gnu11'
+
+# Enable toolchain resolution with cc
+build --incompatible_enable_cc_toolchain_resolution
+
+build:kelvin --platforms=//platforms/riscv32:kelvin