Doug pointed out that the Makefile in src/ should build libcvmix.a in the
same way that an OGCM would -- namely by "make -f shared/Makefile" with
all the necessary flags (compiler, compiler flags, directories for source,
object, and library files). This is a change from the old method, where the
Makefile in src/shared/ would check to see if it was part of a full CVMix
checkout and use the environment information from ../../bld/.CVMix_env if that
file was available.