Remove hardcoded CCLINK's in Imakefiles when linking with C++ built libs (DtSvc).

Added proper SharedDtSvcReqs in lnxLib.tmpl and CplusplusLibC in
linux.cf.  This allows the libstdc++ dependancy to be properly
declared for libDtSvc so that it is not neccessary to hardcode 'CCLINK
= g++' in the Imakefiles of programs linking angainst libDtSvc.

cde/programs/dtimsstart/Imakefile

@@ -25,12 +25,6 @@ EXTRA_CCOPTIONS = -xF
 EXTRA_DEFINES = -DANSICPP
 #endif /* RsArchitecture */
 
-XCOMM On Linux once you link against a C++ library the whole program
-XCOMM has to be linked with the C++ linker
-#if defined(LinuxArchitecture)
-CCLINK = $(CXX)
-#endif
-
 PROGRAMS=dtimsstart 
 
 SRCS =	action.c 	env.c		file.c \