Properly handle the hash-style linker check when cross-compiling

Currently the hash-style check fails when cross-compiling,
use AC_RUN_IFELSE to properly handle this case.

checking for --hash-style gcc linker support ...
./configure: line 12119: ./conftest: cannot execute binary file

Change-Id: I77c2d6a859c1c2e6ba42f31b527a9507127d0644
Reviewed-on: https://gerrit.libreoffice.org/11496Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

configure.ac

@@ -4906,16 +4906,17 @@ if test "$GCC" = "yes"; then
         hash_style_ldflags_save=$LDFLAGS
         LDFLAGS="$LDFLAGS -Wl,--hash-style=$hash_style"
 
-        AC_LINK_IFELSE([AC_LANG_PROGRAM(
+        AC_RUN_IFELSE([AC_LANG_PROGRAM(
             [
 #include <stdio.h>
             ],[
 printf ("");
             ])],
-            [ if ./conftest$EXEEXT; then
+            [
                   HAVE_LD_HASH_STYLE=TRUE
                   WITH_LINKER_HASH_STYLE=$hash_style
-              fi],
+            ],
+            [HAVE_LD_HASH_STYLE=FALSE],
             [HAVE_LD_HASH_STYLE=FALSE])
         LDFLAGS=$hash_style_ldflags_save
     done