Added more configure tests.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7940 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index 96e4b49..1f23472 100644
--- a/configure.in
+++ b/configure.in
@@ -986,7 +986,11 @@
         sys/eventfd.h    \
         sys/klog.h       \
         sys/poll.h       \
+        sys/signal.h     \
         sys/signalfd.h   \
+        sys/syscall.h    \
+        sys/time.h       \
+        sys/types.h      \
         ])
 
 
@@ -1002,7 +1006,10 @@
 AC_FUNC_MMAP
 AC_TYPE_SIGNAL
 
+AC_CHECK_LIB([rt], [clock_gettime])
+
 AC_CHECK_FUNCS([     \
+        clock_gettime\
         epoll_create \
         epoll_pwait  \
         floor        \
@@ -1014,6 +1021,7 @@
         ppoll        \
         semtimedop   \
         signalfd     \
+        syscall      \
         strchr       \
         strdup       \
         strpbrk      \