Add definition of __eh_pc and __throw to --no-whole-archive test program.

configure

@@ -1560,10 +1560,12 @@ if eval "test \"`echo '$''{'libc_cv_ld_no_whole_archive'+set}'`\" = set"; then
 else
   cat > conftest.c <<\EOF
 _start () {}
+int __eh_pc;
+__throw () {}
 EOF
 if { ac_try='${CC-cc} $CFLAGS
 			    -nostdlib -nostartfiles -Wl,--no-whole-archive
-			    -o conftest conftest.c'; { (eval echo configure:1567: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
+			    -o conftest conftest.c'; { (eval echo configure:1569: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
   libc_cv_ld_no_whole_archive=yes
 else
   libc_cv_ld_no_whole_archive=no