Rename posish -> rsix in a few more places.

Author: sunfishcode

.github/actions/install-rust/main.js

@@ -18,8 +18,8 @@ child_process.execFileSync('rustup', ['default', toolchain]);
 
 // Deny warnings on CI to keep our code warning-free as it lands in-tree. Don't
 // do this on nightly though since there's a fair amount of warning churn there.
-// POSISH: Disable this so that it doesn't overwrite RUSTFLAGS for setting
-// "--cfg posish_use_libc". We re-add it manually in the workflow.
+// RSIX: Disable this so that it doesn't overwrite RUSTFLAGS for setting
+// "--cfg rsix_use_libc". We re-add it manually in the workflow.
 //if (!toolchain.startsWith('nightly')) {
 //  set_env("RUSTFLAGS", "-D warnings");
 //}

.github/workflows/main.yml

@@ -250,8 +250,8 @@ jobs:
       env:
         RUST_BACKTRACE: 1
 
-  test_posih_use_libc:
-    name: Test posish_use_libc
+  test_rsix_use_libc:
+    name: Test rsix_use_libc
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -285,12 +285,12 @@ jobs:
             qemu_target: riscv64-linux-user
     env:
       # -D warnings is commented out in our install-rust action; re-add it here.
-      RUSTFLAGS: --cfg posish_use_libc -D warnings
-      RUSTDOCFLAGS: --cfg posish_use_libc
-      CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg posish_use_libc
-      CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg posish_use_libc
-      CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg posish_use_libc
-      CARGO_TARGET_RISCV64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg posish_use_libc
+      RUSTFLAGS: --cfg rsix_use_libc -D warnings
+      RUSTDOCFLAGS: --cfg rsix_use_libc
+      CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg rsix_use_libc
+      CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg rsix_use_libc
+      CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg rsix_use_libc
+      CARGO_TARGET_RISCV64_UNKNOWN_LINUX_GNU_RUSTFLAGS: --cfg rsix_use_libc
     steps:
     - uses: actions/checkout@v2
       with: