Error msg in common.sh should be printed into stderr
in order to avoid improper usage.
For example:
If env has no lspci and pciconf, then function
iter_all_pci_class_code will return the error msg back,
every word in error msg will be used by caller wrongly.
Change-Id: I6a875e49527539ba82bd331c8878e972e26cbc39
Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1227
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
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