Parser for JDBG files

[Anders@Melander]

Embarcadero does not supply map files for the RTL/VCL rune time packages. Instead they ship jdbg (JEDI Debug format) files that can be read with the JEDI debug functions.

The jdbg are built from map files so supposedly they contains much, if not all, of the information we need. The task here is to write a reader for the jdbg file format so we can produce pdb files from them.

References:

• TJclBinDebugScanner

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[Anders Melander]

Added support for reading jdbg files. Fixes #2

→ <<cset d63223f71774>>

[Anders Melander]

Fix for jdbg with missing source file entries (orphan line numbers). Refs #2

→ <<cset c409127f01d1>>