6729552: jvm98 crashes with SS12 built jdk on Solaris X64 fastdebug version

Summary: SS12 C++ tripped over new templates usage in instanceKlass.cpp.
Reviewed-by: never

make/solaris/makefiles/fastdebug.make

@@ -38,6 +38,8 @@ OPT_CFLAGS/SLOWER = -xO2
 
 # Problem with SS12 compiler, dtrace doesn't like the .o files  (bug 6693876)
 ifeq ($(COMPILER_REV), 5.9)
+  # To avoid jvm98 crash
+  OPT_CFLAGS/instanceKlass.o = $(OPT_CFLAGS/SLOWER)
   # Not clear this workaround could be skipped in some cases.
   OPT_CFLAGS/vmGCOperations.o = $(OPT_CFLAGS/SLOWER)
   OPT_CFLAGS/java.o = $(OPT_CFLAGS/SLOWER)