Roll libxml to 8effcb578e0590cc01bbcab0f9dccefc6bdbcdbd

third_party/libxml/src/m4/libtool.m4

Index: third_party/libxml/src/m4/libtool.m4
diff --git a/third_party/libxml/src/m4/libtool.m4 b/third_party/libxml/src/m4/libtool.m4
index a644432f431895cff03337b765a7389c7fd0c221..a3bc337b79ad3d2bd26f0c10644e55db74e70448 100644
--- a/third_party/libxml/src/m4/libtool.m4
+++ b/third_party/libxml/src/m4/libtool.m4
@@ -2867,9 +2867,6 @@ linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
   # before this can be enabled.
   hardcode_into_libs=yes
 
-  # Add ABI-specific directories to the system library path.
-  sys_lib_dlsearch_path_spec="/lib64 /usr/lib64 /lib /usr/lib"
-
   # Ideally, we could use ldconfig to report *all* directores which are
   # searched for libraries, however this is still not possible.  Aside from not
   # being certain /sbin/ldconfig is available, command
@@ -2878,7 +2875,7 @@ linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
   # appending ld.so.conf contents (and includes) to the search path.
   if test -f /etc/ld.so.conf; then
     lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \[$]2)); skip = 1; } { if (!skip) print \[$]0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '`
-    sys_lib_dlsearch_path_spec="$sys_lib_dlsearch_path_spec $lt_ld_extra"
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
   fi
 
   # We used to test for /lib/ld.so.1 and disable shared libraries on