gdb: Help gnulib determine uClibc gettimeofday() is OK

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

patches/gdb/7.11/101-uclibc-no-gettimeofday-clobber.patch

@@ -0,0 +1,20 @@
+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>
+
+--- a/gdb/gnulib/configure	2016-02-25 18:17:04.145903807 +0100
++++ b/gdb/gnulib/configure	2016-02-25 18:17:28.545903821 +0100
+@@ -13520,8 +13520,9 @@
+   if test "$cross_compiling" = yes; then :
+   # When cross-compiling:
+       case "$host_os" in
+-                # Guess all is fine on glibc systems.
++                # Guess all is fine on glibc/uclibc systems.
+         *-gnu*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
++        *-uclibc*) gl_cv_func_gettimeofday_clobber="guessing no" ;;
+                 # If we don't know, assume the worst.
+         *)      gl_cv_func_gettimeofday_clobber="guessing yes" ;;
+       esac