[cpp/libc] Fix to avoid conflict with CODESET macro

I'm pretty sure it's a #define in musl libc on Alpine, while it's not in
glibc

- Update oils-for-unix tarball version, so we fetch code with the latest
  fixes

Author: Andy C

cpp/libc.h

@@ -41,14 +41,15 @@ int sleep_until_error(double seconds);
 // pylib/locale_.py
 namespace pylocale {
 
-const int CODESET = ::CODESET;
-
+constexpr int codeset = CODESET;
 constexpr int lc_all = LC_ALL;
 constexpr int lc_ctype = LC_CTYPE;
+#undef CODESET
 #undef LC_ALL
 #undef LC_CTYPE
-const int LC_ALL = lc_all;
-const int LC_CTYPE = lc_ctype;
+constexpr int CODESET = codeset;
+constexpr int LC_ALL = lc_all;
+constexpr int LC_CTYPE = lc_ctype;
 
 class Error {
  public:

regtest/aports-setup.sh

@@ -65,7 +65,7 @@ checkout-stable() {
 }
 
 download-oils() {
-  local job_id=${1:-9951}  # 2025-08
+  local job_id=${1:-10054}  # 2025-08 - IFS fix and musl libc fix
 
   local url="https://op.oilshell.org/uuu/github-jobs/$job_id/cpp-tarball.wwz/_release/oils-for-unix.tar"