Make sure .mx files are extracted before entering a subdir. This fixes the problem that sql/backends/monet5/UDF was being built before sql.h existed in sql/backends/monet5.
Make sure .mx files are extracted before entering a subdir.
This fixes the problem that sql/backends/monet5/UDF was being built
before sql.h existed in sql/backends/monet5.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb