Merge pull request #31019 from compnerd/x86-shims

runtime: extend shims to x86

Author: compnerd

stdlib/public/runtime/Float16Support.cpp

@@ -30,7 +30,7 @@
 // Android NDK <r21 do not provide `__aeabi_d2h` in the compiler runtime,
 // provide shims in that case.
 #if (defined(ANDROID) && defined(__ARM_ARCH_7A__) && defined(__ARM_EABI__)) || \
-  (defined(__x86_64__) && !defined(__APPLE__))
+  ((defined(__i686__) || defined(__x86_64__)) && !defined(__APPLE__))
 
 #include "../SwiftShims/Visibility.h"