Set Locale to English when uppercasing strings to match Enums

Fixes https://github.com/bazelbuild/bazel/issues/5157

If a user's default system locale is not `en`, `en_US` or `en_UK`, there may be a chance that `String#toUpperCase` will result in a string that does not exist in the Enum declaration. This is the case in #5157.

To fix this, it's either

1) setting the Locale in the individual `toUpperCase` calls or
2) set Locale to English by default from `Bazel.java`.

I chose the first because it seemed less intrusive, but I'm open to suggestions.

Closes #5184.

PiperOrigin-RevId: 196261078

src/main/java/com/google/devtools/build/lib/packages/FilesetEntry.java

diff --git a/src/main/java/com/google/devtools/build/lib/packages/FilesetEntry.java b/src/main/java/com/google/devtools/build/lib/packages/FilesetEntry.java
index b6a35ee..8b41b80 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/FilesetEntry.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/FilesetEntry.java
@@ -30,6 +30,7 @@
 import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 import javax.annotation.Nullable;
 
@@ -98,7 +99,7 @@
     DEREFERENCE;
 
     public static SymlinkBehavior parse(String value) throws IllegalArgumentException {
-      return valueOf(value.toUpperCase());
+      return valueOf(value.toUpperCase(Locale.ENGLISH));
     }
 
     @Override