Many renames.

- Everything polkadot becomes polkadot-.
- Wasm (substrate) executor tests split from Wasm (Polkadot) runtime and
built independently.

substrate/pwasm-alloc/src/lib.rs

@@ -0,0 +1,36 @@
+#![warn(missing_docs)]
+#![cfg_attr(feature = "strict", deny(warnings))]
+#![no_std]
+#![crate_type = "rlib"]
+#![cfg_attr(feature = "nightly", feature(global_allocator))]
+#![cfg_attr(feature = "nightly", feature(alloc))]
+#![cfg_attr(feature = "nightly", feature(allocator_api))]
+
+//! Custom allocator crate for wasm
+
+/// Wasm allocator
+pub struct WasmAllocator;
+
+#[cfg(feature = "nightly")]
+#[global_allocator]
+static ALLOCATOR: WasmAllocator = WasmAllocator;
+
+#[cfg(feature = "nightly")]
+mod __impl {
+	extern crate alloc;
+	extern crate pwasm_libc;
+
+	use self::alloc::heap::{Alloc, Layout, AllocErr};
+
+	use super::WasmAllocator;
+
+	unsafe impl<'a> Alloc for &'a WasmAllocator {
+		unsafe fn alloc(&mut self, layout: Layout) -> Result<*mut u8, AllocErr> {
+			Ok(pwasm_libc::malloc(layout.size()))
+		}
+
+		unsafe fn dealloc(&mut self, ptr: *mut u8, _layout: Layout) {
+			pwasm_libc::free(ptr)
+		}
+	}
+}