[qemu] `flashgen.py` rejects `sram_ctrl_execution_test` binary

The error message is:

> Error: Application ELF file does not match binary file

Disabling QEMU for this test until we resolve the problem.

Possibly because the test is doing something interesting with sections?

Start with flashgen.py and reproduce the rejection for the sram_ctrl_execution_test binary, examining how it compares the application ELF with the binary and whether section handling differs. Done means identifying and resolving the mismatch so the test is no longer disabled for QEMU.

Written by the indexing model from the issue text.