osdep.m4: Remove getaddrinfo() too low checks

dante runs AC_PREPROC_IFELSE then it fills $ERRVALFILE by running the
following command:

cat conftest.i | grep gaierrval: >>$2

As a result, $ERRVALFILE does not contain the expected values because
the expected value is not on the same line than gaierrval:

 gaierrval: 
 # 130 "conftest.c" 3 4
           -3

So drop these checks

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

diff -Nuar dante-1.4.2-orig/osdep.m4 dante-1.4.2/osdep.m4
--- dante-1.4.2-orig/osdep.m4	2019-12-09 21:28:38.936003218 +0100
+++ dante-1.4.2/osdep.m4	2019-12-09 21:49:48.764019371 +0100
@@ -956,13 +956,7 @@
 unset UNIQUEVALS UNIQUESYMBOLS
 if test -s $ERRVALFILE; then
     UNIQUEVALS=`sort $ERRVALFILE | uniq | wc -l | awk '{ print $1 }'`
-    if test $UNIQUEVALS -le 1; then
-        AC_MSG_FAILURE([error: getaddrinfo() error value count too low])
-    fi
     UNIQUESYMBOLS=`cat $ERRVALFILE | wc -l | awk '{ print $1 }'`
-    if test $UNIQUESYMBOLS -le 1; then
-        AC_MSG_FAILURE([error: getaddrinfo() error symbol count too low])
-    fi
 
     if test $ERRNOCNT -ne $UNIQUESYMBOLS; then
 	AC_MSG_FAILURE([internal error: errno symbol count mismatch])