Comment # 2 on bug 983749 from Richard Biener

Similar to aarch64 it might be enough to bump FFI_TRAMPOLINE_SIZE back to 20.

The change came with

r219477 | rth | 2015-01-12 17:19:59 +0100 (Mon, 12 Jan 2015) | 1 line

Merge libffi to upstream commit c82cc159426d8d4402375fa1ae3f045b9cf82e16

note that fixing this for SLE12 will likely not happen (GCC 5 won't see another
update and arm is not a SLE12 target).  For GCC 6 I am not building its libffi
for now so putting in GCC 6 won't help either.

An option for 42.2 arm is to block libffi4-gcc5 from the media/repo after
adding

Macros:
product_libs_gcc_ver_libffi4 48