autotools: many fixups, SUN->SOLARIS, typos, etc

This should allow an autoregen and ./confiure to work.  We only
generate Makefiles for lib/* and ./Makefile for now.  We'll ad more as
we go along.

Make still fails as we need to figure out TT - tirpc lib, rpcgen,
etc.  But it's a start!

cde/lib/DtSearch/Makefile.am

@@ -21,7 +21,7 @@ if BSD
 libDtSearch_la_CFLAGS += -DBYTE_SWAP
 endif
 
-if SUN
+if SOLARIS
 libDtSearch_la_CFLAGS += -DBYTE_SWAP
 libDtSearch_la_LIBADD += -lm -lc
 endif

cde/lib/DtSearch/raima/Makefile.am

@@ -16,7 +16,7 @@ if BSD
 libraima_la_CFLAGS += DBYTE_SWAP -D_XOPEN_SOURCE=700
 endif
 
-if SUN
+if SOLARIS
 libraima_la_CFLAGS += -DBYTE_SWAP -D_XOPEN_SOURCE=500 -DNO_REGCOMP
 endif