options: fix warning on execve
options: fix warning on execve

Fix:
src/options.c: In function ‘execute_man’:
src/options.c:324:9: warning: implicit declaration of function ‘execve’ [-Wimplicit-function-declaration]
         execve (path_man_bin, man_argv, envp);

Signed-off-by: William Roberts <60148e894dabf0b83bde1d460768794cd453c455@intel.com>

01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools