fix musl compile

package/gdb/patches/patch-gdb_gdbserver_configure

@@ -0,0 +1,20 @@
+--- gdb-7.6.orig/gdb/gdbserver/configure	2013-03-11 09:35:09.000000000 +0100
++++ gdb-7.6/gdb/gdbserver/configure	2013-12-23 19:39:06.000000000 +0100
+@@ -4927,9 +4927,6 @@ if test "${GCC}" = yes -a -z "${ERROR_ON
+ fi
+ 
+ WERROR_CFLAGS=""
+-if test "${ERROR_ON_WARNING}" = yes ; then
+-    WERROR_CFLAGS="-Werror"
+-fi
+ 
+ build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
+ -Wformat-nonliteral -Wno-char-subscripts -Wempty-body"
+@@ -4943,7 +4940,6 @@ $as_echo_n "checking compiler warning fl
+     # compiled with it enabled.
+     for w in ${build_warnings}; do
+ 	case $w in
+-	-Werr*) WERROR_CFLAGS=-Werror ;;
+ 	*) # Check that GCC accepts it
+ 	    saved_CFLAGS="$CFLAGS"
+ 	    CFLAGS="$CFLAGS $w"