Increase test 1926 stack size to 10MB

It was failing on ASAN because we were running out of stack space when
running some class initializes deep in the stack.

Test: ./test.py --host
Test: ./test/testrunner/run_build_test_target.py -j50 art-asan
Change-Id: Ie5eaab5be0adfa7f87cce2bbaea82885024c6fec
1 file changed