eal: remove panic on remote launch failure

Library functions should not cause the app to exit or panic. Replace the
existing panic call in the EAL remote launch functions with an error
code return i

eal: remove panic on remote launch failure

Library functions should not cause the app to exit or panic. Replace the
existing panic call in the EAL remote launch functions with an error
code return instead.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>

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eal: factorize lcore main loop

All OS implementations provide the same main loop.
Introduce helpers (shared for Linux and FreeBSD) to handle synchronisation
between main and threads and factorize th

eal: factorize lcore main loop

All OS implementations provide the same main loop.
Introduce helpers (shared for Linux and FreeBSD) to handle synchronisation
between main and threads and factorize the rest as common code.
Thread id are now logged as string in a common format across OS.

Note:
- this change also fixes Windows EAL: worker threads cpu affinity was
incorrectly reported in log.

- libabigail flags this change as breaking ABI in clang builds:
1 function with some indirect sub-type change:

[C] 'function int rte_eal_remote_launch(int (void*)*, void*, unsigned
int)' at eal_common_launch.c:35:1 has some indirect sub-type
changes:
parameter 1 of type 'int (void*)*' changed:
in pointed to type 'function type int (void*)' at rte_launch.h:31:1:
entity changed from 'function type int (void*)' to 'typedef
lcore_function_t' at rte_launch.h:31:1
type size hasn't changed

This is being investigated on libabigail side.
For now, we don't have much choice but to waive reports on this symbol.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

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