initial commit of heartbeat on ch32v

ch32v-insert-coin/riscv32ec-unknown-none-elf.json

@@ -0,0 +1,18 @@
+{
+    "arch": "riscv32",
+    "atomic-cas": false,
+    "cpu": "generic-rv32",
+    "crt-objects-fallback": "false",
+    "data-layout": "e-m:e-p:32:32-i64:64-n32-S32",
+    "eh-frame-header": false,
+    "emit-debug-gdb-scripts": false,
+    "features": "+e,+c,+forced-atomics",
+    "linker": "rust-lld",
+    "linker-flavor": "gnu-lld",
+    "llvm-target": "riscv32",
+    "llvm-abiname": "ilp32e",
+    "max-atomic-width": 32,
+    "panic-strategy": "abort",
+    "relocation-model": "static",
+    "target-pointer-width": "32"
+}