6624782: Bigapps crashes during CMS precleaning.

Summary: Lowered optimization level for files instanceKlass.cpp and objArrayKlass.cpp
Reviewed-by: ysr

build/solaris/makefiles/amd64.make

@@ -45,6 +45,10 @@ OPT_CFLAGS/os_solaris_x86_64.o = -xO1
 OPT_CFLAGS/generateOptoStub.o = -xO2
 OPT_CFLAGS/thread.o = -xO2
 
+# Work around for 6624782
+OPT_CFLAGS/instanceKlass.o = -Qoption ube -no_a2lf
+OPT_CFLAGS/objArrayKlass.o = -Qoption ube -no_a2lf
+
 else
 
 ifeq ("${Platform_compiler}", "gcc")