Fix for Bug 2980 - "#include <OpenSystemTrace.h>" is a case-violation on Linux. This is not a GCCE compatibility bug but I need it fixed because I'm building on Linux
1) Revised fix for Bug 2975 - [GCCE] Illegal inline assembler in kernel/eka/drivers/debug/rmdebug/d_rmd_stepping.cpp.
Should have conditionally different code for __ARMCC__ and __GCCE_
2) Fix for Bug 2976 - [GCCE] Overlapping naked function bodies break exception-handling.
3) Fix an incidental "impossible constraint in asm" gripe.