add sys/time.h and gettimeofday detection to configure.ac courtesy autoscan
add sys/time.h and gettimeofday detection to configure.ac courtesy autoscan

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

mdroth/powerpc-utils,leitao/powerpc-ibm-utils-debian,leitao/powerpc-ibm-utils-debian,shenki/powerpc-utils,kamalesh-babulal/powerpc-utils,kamalesh-babulal/powerpc-utils,kamalesh-babulal/powerpc-utils,shenki/powerpc-utils,leitao/powerpc-ibm-utils-debian,shenki/powerpc-utils,mdroth/powerpc-utils,mdroth/powerpc-utils