Pull up following revision(s) (requested by plunky in ticket #157):
external/bsd/pcc/Makefile.inc
external/bsd/pcc/dist/pcc/DATESTAMP
external/bsd/pcc/dist/pcc/arch/amd64/local.c
external/bsd/pcc/dist/pcc/arch/i386/local2.c
external/bsd/pcc/dist/pcc/arch/vax/local2.c
external/bsd/pcc/dist/pcc/cc/cc/Makefile.in
external/bsd/pcc/dist/pcc/cc/ccom/Makefile.in
external/bsd/pcc/dist/pcc/cc/ccom/builtins.c
external/bsd/pcc/dist/pcc/cc/ccom/ccom.1
external/bsd/pcc/dist/pcc/cc/ccom/cgram.y
external/bsd/pcc/dist/pcc/cc/ccom/gcc_compat.c
external/bsd/pcc/dist/pcc/cc/ccom/init.c
external/bsd/pcc/dist/pcc/cc/ccom/inline.c
external/bsd/pcc/dist/pcc/cc/ccom/main.c
external/bsd/pcc/dist/pcc/cc/ccom/optim.c
external/bsd/pcc/dist/pcc/cc/ccom/pass1.h
external/bsd/pcc/dist/pcc/cc/ccom/pftn.c
external/bsd/pcc/dist/pcc/cc/ccom/stabs.c
external/bsd/pcc/dist/pcc/cc/ccom/trees.c
external/bsd/pcc/dist/pcc/cc/cpp/Makefile.in
external/bsd/pcc/dist/pcc/cc/cxxcom/Makefile.in
external/bsd/pcc/dist/pcc/cc/cxxcom/builtins.c
external/bsd/pcc/dist/pcc/cc/cxxcom/gcc_compat.c
external/bsd/pcc/dist/pcc/cc/cxxcom/init.c
external/bsd/pcc/dist/pcc/cc/cxxcom/inline.c
external/bsd/pcc/dist/pcc/cc/cxxcom/main.c
external/bsd/pcc/dist/pcc/cc/cxxcom/optim.c
external/bsd/pcc/dist/pcc/cc/cxxcom/pass1.h
external/bsd/pcc/dist/pcc/cc/cxxcom/pftn.c
external/bsd/pcc/dist/pcc/cc/cxxcom/stabs.c
external/bsd/pcc/dist/pcc/cc/cxxcom/trees.c
external/bsd/pcc/dist/pcc/cc/driver/Makefile.in
external/bsd/pcc/dist/pcc/f77/f77/Makefile.in
external/bsd/pcc/dist/pcc/f77/fcom/Makefile.in
external/bsd/pcc/dist/pcc/f77/fcom/main.c
external/bsd/pcc/dist/pcc/mip/common.c
external/bsd/pcc/dist/pcc/mip/manifest.h
external/bsd/pcc/dist/pcc/mip/match.c
external/bsd/pcc/dist/pcc/mip/pass2.h
external/bsd/pcc/dist/pcc/mip/reader.c
external/bsd/pcc/dist/pcc/mip/regs.c
external/bsd/pcc/include/config.h

Update to pcc-20120325

The full changelog is at

http://pcc.ludd.ltu.se/fisheye/changelog/~date=2012-03-25T06%3A00%3A00/pcc

and includes some bug and documentation fixes.

The siginifcant improvements were that the __returns_twice__ attribute is
now accepted, and a problem parsing attributes on parameters of function
prototypes was fixed.

(both of these issues caused problems compiling with the NetBSD headers)