add libs

lib_src/.gitignore

@@ -0,0 +1,34 @@
+**/.build*/*
+**/bin/*
+*.o
+*.xe
+*.vcd
+*.xi
+*.i
+*.a
+**/_build/
+**/run_*.log
+**/pdf/*
+*.pyc
+test_results.csv
+*.xmt
+output*.dat
+*.swp
+.*.swp
+.*.*.swp
+*.swo
+*.todo
+org.eclipse.cdt.core.prefs
+xsim.args
+tests/src_output
+*.bak
+**/.venv/**
+build/
+tests/tmp
+tests/vpu_ff3_test/autogen
+tests/vpu_rat_test/autogen
+*.csv
+python/lib_src.egg-info
+**/tmp_models/
+*.bak
+make_docs.sh