samba: defeat iconv test

A test was added when configuring samba which requires target code
to be executed.  In general, this will not work, so we eliminate it.

Upstream-Status: Pending

Signed-off-by: Joe Slater <joe.slater@windriver.com>

--- a/lib/util/charset/wscript_configure
+++ b/lib/util/charset/wscript_configure
@@ -17,6 +17,8 @@ if (conf.CHECK_FUNCS_IN('iconv_open', 'i
     
     conf.DEFINE('HAVE_NATIVE_ICONV', 1)
 
+"""
+[added for 4.7.0, but breaks cross-compilation]
 conf.CHECK_CODE('''
                 uint8_t inbuf[2] = { 0x30, 0xdf };
                 uint8_t outbuf[4] = { 0 };
@@ -36,3 +38,4 @@ conf.CHECK_CODE('''
                 msg='Checking errno of iconv for illegal multibyte sequence',
                 lib='iconv',
                 headers='errno.h iconv.h')
+"""