All-in-one build command

`./make-linux` clones and builds:

- arrow
- brotli
- lz4
- parquet
- snappy
- zlib
- zstd
- this project

as a statically linked binary. Two Boost libs are still pulled in as
shared libs, should probably fix that, too, for ultimate portability.

.gitignore

@@ -51,3 +51,4 @@ tests/queries
 /tests/test.db
 /tests/results.bad_alloc
 /tests/libfailmalloc
+/build/linux