Bug 1608326 - don't unset WASM_SANDBOXED_LIBRARIES for Linux artifact builds; r=firefox-build-system-reviewers,chmanchester

Otherwise we won't package the necessary libraries, which leads to
peculiar runtime failures.

Depends on D59555

Differential Revision: https://phabricator.services.mozilla.com/D59556

--HG--
extra : moz-landing-system : lando

build/mozconfig.no-compile

@@ -39,7 +39,11 @@ unset NM
 unset RANLIB
 unset NASM
 
-unset WASM_SANDBOXED_LIBRARIES
+# Don't unset this on Linux artifact builds so the artifact builds correctly
+# package the graphite shared library.
+if test `uname -s` != Linux; then
+  unset WASM_SANDBOXED_LIBRARIES
+fi
 unset WASM_CC
 unset WASM_CXX
 unset LUCETC