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/dtappbuilder/src/abmf/Imakefile

@@ -109,12 +109,6 @@ CCOPTIONS = -qnoro
 WAITTARGET = .WAIT
 #endif	/* SunArchitecture */
 
-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 = dtcodegen
 LINTLIBS = $(XINPUTLIB) $(DTHELPLIB) $(DTSVCLIB) $(XMLIB) $(XTOOLLIB) $(XLIB)