Don't build the "Story of Your Compile" report by default

Creating this report is expensive, and its not generally used
during development.  Don't bother with it unless requested by
a developer by passing -Dgwt.soyc=true.

Change-Id: I8a9a97ea7c1d4e8404fe32fa5c9fe0ca686db01b
Signed-off-by: Shawn O. Pearce <sop@google.com>
2 files changed