fix: support new trace compiler features for preventing clashes. Automatically turn on OST_TRACE_COMPILER_IN_USE macro. Look for trace header in systemincludes. Make directories in makefile parse to prevent clashes during build. Correct path for autogen headers. Correct case issue with autogen headers on Linux.

NOTESRC_RELEASER
Symbian Software Ltd. (kits.notify@symbian.com)

NOTESRC_RELEASE_REASON
Symbian Build System release.