files_to_obj: Disable exit-on-error for as brief as possible.
files_to_obj: Disable exit-on-error for as brief as possible.

In particular, prior to this commit the failure of cpio-strip would not be
noticed.

winksaville/common-tool,winksaville/common-tool,hendersa/px4-common-tool,hendersa/px4-common-tool,seL4/common-tool,seL4/common-tool,seL4/common-tool,winksaville/common-tool,hendersa/px4-common-tool