Add new config for sparc/solaris, matching what was done for x86. The
sun4_solaris_gcc and sun4_solaris_sunc configs are now obsolete, but we leave the around for now. Tested both configs and they work. lisp/Config.sparc_common: o New file for common config for gcc and Sun C builds on Solaris lisp/Config.sparc_gcc: o New file for building on sparc/solaris with gcc lisp/Config.sparc_sunc: o New file for building on sparc/solaris with Sun C tools/create-target.sh: o Change default from sun4_solaris_gcc to sparc_gcc to use new configuration.