generate_whitelist: adjust variable name

Remove all references to `whitelist` in the variable naming in favor
of `allowlist`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icfd536682cbdbb9ecf74d27e0fe028d98999084f
diff --git a/generate_whitelist.sh b/generate_whitelist.sh
index f04be09..d3d03e3 100755
--- a/generate_whitelist.sh
+++ b/generate_whitelist.sh
@@ -2,7 +2,7 @@
 
 # Ensure some files have been passed.
 if [ -z "$*" ]; then
-    echo "Usage: $0 [whitelist_files+]" >&2
+    echo "Usage: $0 [allowlist_files+]" >&2
     exit 1
 fi
 
@@ -13,7 +13,7 @@
 
 EOF
 
-# Output each row of whitelist vector.
+# Output each row of allowlist vector.
 # Concatenate all the passed files.
 # Remove comments and empty lines.
 # Sort the list [numerically].