Add -fpermissive to linux standard c++ option define in linux.cf

Remove from individual Imakefiles.

Also, remove '#if 0' block in linux.cf, and remove empty
LinuxMachineDefines. This should be working correctly.  If not, let me
know.

cde/lib/tt/bin/dbck/Imakefile

@@ -19,10 +19,6 @@ SYS_LIBRARIES   =
 EXTRA_LIBRARIES = TtClientExtraLibs
 #endif
 
-#if defined(LinuxArchitecture)
-CXXEXTRA_DEFINES = -fpermissive
-#endif
-
 SRCS =  binkey.C        binkey_utils.C  common.C \
         options.C       options_tt.C    prop.C \
         prop_utils.C    spec.C          spec_repair.C \

cde/lib/tt/bin/tt_type_comp/Imakefile

@@ -19,10 +19,6 @@ SYS_LIBRARIES   =
 EXTRA_LIBRARIES = TtClientExtraLibs
 #endif
 
-#if defined(LinuxArchitecture)
-CXXEXTRA_DEFINES = -fpermissive
-#endif
-
 SRCS =	mp_type_comp.C        mp_types_table.C \
 	frozen.mp_types_lex.C frozen.mp_types_gram.C
 

cde/lib/tt/bin/ttdbserverd/Imakefile

@@ -19,10 +19,6 @@ SYS_LIBRARIES   =
 EXTRA_LIBRARIES = TtClientExtraLibs
 #endif
 
-#if defined(LinuxArchitecture)
-CXXEXTRA_DEFINES = -fpermissive
-#endif
-
 SRCS = \
         db_server_functions.C \
         db_server_svc.C \

cde/lib/tt/bin/ttsession/Imakefile

@@ -19,10 +19,6 @@ SYS_LIBRARIES   =
 EXTRA_LIBRARIES = TtClientExtraLibs
 #endif
 
-#if defined(LinuxArchitecture)
-CXXEXTRA_DEFINES = -fpermissive
-#endif
-
 SRCS = mp_server.C
 
 OBJS = mp_server.o