www/chromium: Add back some patches lost in the 37 -> 38 update.
Bump PORTREVISION

Submitted by:	tomek@apostata.org
MFH:		2014Q4
Add support for -fformat-extensions meaning we can now build the kernel

Submitted by:	kan
Update to MPICH 3.1.3

From the announcement:
This release adds several enhancements to Portals4 support, PAMI, RMA, and
ROMIO.  It also contains a large number of bug fixes.
Clean up pkg-plist of my ports.
devel/pecl-event: update 1.9.0 -> 1.10.3

PR:		194159
Submitted by:	John Chen <johnpupu@gmail.com>
Approved by:	mentors (implicit)