build: fix undefined symbol compilation errors
build: fix undefined symbol compilation errors

The function `abort_process` is only defined if the preprocessor symbol
`USE_TIMERS` is defined.  Additionally, the variable `ssl_mutexes` is
only defined if the preprocessor symbol `OPENSSL_APP_1_1` is not
defined.  This patch updates the source to put calls to these values
inside correct preprocessor include guards.

Signed-off-by: Keith Holman <8f11bf990f36a0538e23d1881157bace2cc85066@windriver.com>

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