vndk-def: Add (vndk-sp)? to fwk-only-rs matching

This commit adds (?:vndk-sp)? to FWK-ONLY-RS matching because some
targets have a copy of libft2.so in /system/lib[64]/vndk-sp but we still
want to treat it as FWK-ONLY-RS.

Bug: 37867089
Test: libft2.so is not labeled as vndk-sp-indirect in sailfish image.
Merged-In: Iad5db6417573f3e25bad5c027cb547d9df4be23a
(cherry picked from commit 6582daf969)

Change-Id: I2a6c9741444739d56d0db00792f2bc4ffd417125

vndk/tools/definition-tool/vndk_definition_tool.py

@@ -1098,8 +1098,8 @@ class ELFLinker(object):
     def compute_predefined_fwk_only_rs(self):
         """Find all fwk-only-rs libraries."""
         path_patterns = (
-            '^/system/lib(?:64)?/libft2\\.so$',
-            '^/system/lib(?:64)?/libmediandk\\.so',
+            '^/system/lib(?:64)?/(?:vndk-sp/)?libft2\\.so$',
+            '^/system/lib(?:64)?/(?:vndk-sp/)?libmediandk\\.so',
         )
         return self.compute_path_matched_lib(path_patterns)