Do not create ABI dumps for NDK stub libraries

Some NDK stub libraries are tagged with "LLNDK" in lsdump_paths.txt
because they are not in NDK, and their base module names are in LLNDK.
This commit excludes those NDK stub libraries from lsdump path list.

Test: make findlsdumps
Bug: 147409497
Change-Id: I7a72758ba40d5f5bda8c436dd0b22e5efda03a32