use file:line:col as key for the xref dict

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
extract docs and use xrefs key
compiler script

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
sqlite3: fedora has libsqlite3.so in /usr/lib64

Signed-off-by: Adrian Negreanu <groleo@gmail.com>
SQLITE_TRANSIENTs

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
search.py: get includ(ers|ees), class members, base-classes and sub-classes

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
skeleton for a sqlite3gen test