Revert "Make compiler/optimizing/ symbols hidden."

This reverts commit e2727154f25e0db9a5bb92af494d8e47b181dfcf.

Reason for revert: Breaks ASAN tests (ODR violation).
Bug: 142365358

Change-Id: I38103d74a1297256c81d90872b6902ff1e9ef7a4
diff --git a/tools/generate_operator_out.py b/tools/generate_operator_out.py
index a886b98..921ae68 100755
--- a/tools/generate_operator_out.py
+++ b/tools/generate_operator_out.py
@@ -65,7 +65,7 @@
                     continue
 
                 # Is this the start or end of a namespace?
-                m = re.search(r'^namespace (\S+) (HIDDEN |EXPORT )?\{', raw_line)
+                m = re.search(r'^namespace (\S+) \{', raw_line)
                 if m:
                     namespaces.append(m.group(1))
                     continue