Bug#926180: scilab: FTBFS on all

[Rebecca N. Palmer]

> * valgrind: reports a _lot_ of invalid memory accesses,

It now looks like these are actually "valgrind doesn't understand Java 
memory allocation" - 'valgrind jdb' and 'valgrind jar' also report large 
numbers of "invalid" accesses.

However, the segfaults are still evidence that this is memory 
corruption, not baseline violation.