hg: amber/amber: experimental: increasing the size of O_BUFLEN at ostream to obtain a more detailed stack output

[vicente.romero at oracle.com]

Changeset: 1bd391c995f4
Author:    vromero
Date:      2019-04-03 19:46 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/1bd391c995f4

experimental: increasing the size of O_BUFLEN at ostream to obtain a more detailed stack output

! src/hotspot/share/utilities/ostream.hpp