20250911-linuxkm-dont-undefine-CONFIG_OBJTOOL

[douzzer]

linuxkm/Kbuild: don't undefine CONFIG_OBJTOOL (breaks FIPS hash stability on some target kernels/configs);

add config-based gate on $(WOLFCRYPT_PIE_FILES): OBJECT_FILES_NON_STANDARD := y.

tested with

wolfssl-multi-test.sh ...
check-source-text-fips-dev
linuxkm-fips-v5-strict-dist-insmod-cust2
linuxkm-fips-v5-vanilla-dist-insmod-cust3

[douzzer]

retest this please

Found unhandled hudson.remoting.RequestAbortedException exception:
java.io.StreamCorruptedException: invalid stream header: 636F7272
	hudson.remoting.Request.abort(Request.java:358)
	hudson.remoting.Channel.terminate(Channel.java:1196)
	hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:95)