runtime: copy runtime package time code from Go 1.7
Fix handling of function values for -fgo-c-header to generate FuncVal*,
not simply FuncVal.
While we're here change runtime.nanotime to use clock_gettime with
CLOCK_MONOTONIC, rather than gettimeofday. This is what the gc library
does. It provides nanosecond precision and a monotonic clock.
Reviewed-on: https://go-review.googlesource.com/31232
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241197 138bc75d-0d04-0410-961f-82ee72b054a4
12 files changed: