Improve gnulib in gdb's guess work, gettimeofday() works in uClibcm promise.

This patch helps building x86_64-unknown-linux-uclibc toolchains, the final
gdb-native step otherwise fails when linking the libinproctrace.so

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Signed-off-by: Alexey Neyman <stilor@att.net>

---
 gnulib/configure                 |    2 ++
 gnulib/import/m4/gettimeofday.m4 |    2 ++
 2 files changed, 4 insertions(+)

--- a/gnulib/configure
+++ b/gnulib/configure
@@ -20745,6 +20745,8 @@
       case "$host_os" in
                        # Guess all is fine on glibc systems.
         *-gnu* | gnu*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
+                       # Guess all is fine on uclibc systems.
+        *-uclibc*)     gl_cv_func_gettimeofday_clobber="guessing no" ;;
                        # Guess all is fine on musl systems.
         *-musl*)       gl_cv_func_gettimeofday_clobber="guessing no" ;;
                        # Guess no on native Windows.
--- a/gnulib/import/m4/gettimeofday.m4
+++ b/gnulib/import/m4/gettimeofday.m4
@@ -105,6 +105,8 @@
       case "$host_os" in
                        # Guess all is fine on glibc systems.
         *-gnu* | gnu*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
+                       # Guess all is fine on uclibc systems.
+        *-uclibc*)     gl_cv_func_gettimeofday_clobber="guessing no" ;;
                        # Guess all is fine on musl systems.
         *-musl*)       gl_cv_func_gettimeofday_clobber="guessing no" ;;
                        # Guess no on native Windows.
