libCstd patches

patches/hacks to build with Solaris Studio 12.3 using the (not very std)
libCstd

I am then able to configure/build with:
./configure CC=/appl/solarisstudio12.3/bin/CC \
CXX=/appl/solarisstudio12.3/bin/CC \
AR=/usr/ccs/bin/ar \
CFLAGS="-KPIC" CPPFLAGS="-KPIC" \
LDFLAGS="-lm" \
--with-boost-include=/devlshare/Boost/boost_1_49_0/
/usr/sfw/bin/gmake