Add legacy inlines for locale aware APIs.

Test: make checkbuild tests
Bug: http://b/31639993
Change-Id: Ic43d690dff3c6960d7826bd0b064640a3ea0e883
diff --git a/libc/include/string.h b/libc/include/string.h
index 4a83c4e..b945883 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -387,4 +387,6 @@
 
 __END_DECLS
 
+#include <android/legacy_string_inlines.h>
+
 #endif /* _STRING_H */