Bug 432839 - Fix out of memory condition with Qt projects.

Turn the cache in QtPDOMLinkage into a WeahHashMap.

Change-Id: I261d3aec5ee6b7537c4bfaa204dadd85b686140c
Reviewed-on: https://git.eclipse.org/r/25064
Reviewed-by: Doug Schaefer <dschaefer@qnx.com>
Tested-by: Doug Schaefer <dschaefer@qnx.com>
(cherry picked from commit b12b65bfb8d95020d8138d1155006c8c2dc46a12)
Reviewed-on: https://git.eclipse.org/r/25069
1 file changed