[6.1.0]Fix --host_features with multiple transitions (#17641)

* Fix --host_features with multiple transitions

Fixes #13839 (comment)

Closes #17625.

PiperOrigin-RevId: 513249316
Change-Id: Ied4ab6958febaf320ae9e0f906c8071db0077e43

* Update exec to host

---------

Co-authored-by: Keith Smiley <[email protected]>
Co-authored-by: keertk <[email protected]>

Author: 3 people

src/main/java/com/google/devtools/build/lib/analysis/config/CoreOptions.java

@@ -1009,6 +1009,7 @@ public FragmentOptions getHost() {
 
     // === Pass on C++ compiler features.
     host.incompatibleUseHostFeatures = incompatibleUseHostFeatures;
+    host.hostFeatures = ImmutableList.copyOf(hostFeatures);
     if (incompatibleUseHostFeatures) {
       host.defaultFeatures = ImmutableList.copyOf(hostFeatures);
     } else {