8042727: nsk/jdb/unwatch/unwatch001 crash in InstanceKlass::methods_do(void (*)(Method*))
Summary: Only walk methods in instanceklass if the class is loaded
Reviewed-by: dholmes, fparain
os_family = linux
arch = zero
arch_model = zero
os_arch = linux_zero
os_arch_model = linux_zero
lib_arch = zero
compiler = gcc
gnu_dis_arch = zero
sysdefs = -DLINUX -D_GNU_SOURCE -DCC_INTERP -DZERO -D@ZERO_ARCHDEF@ -DZERO_LIBARCH=\"@ZERO_LIBARCH@\"