[libxml2] Revert the use of SAVE_LDFLAGS in configure.ac

[Daniel Veillard <veillard src gnome org>]

commit ebbd2b725fb206c3fede36c1366931088f89f462
Author: Mattias Hansson <mattihn axis com>
Date:   Mon May 23 13:58:24 2016 +0800

    Revert the use of SAVE_LDFLAGS in configure.ac
    
    For https://bugzilla.gnome.org/show_bug.cgi?id=761252
    
    This reverts commit 7dc24965092d7cc310908d6052913050e88ec072.

 configure.ac |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index af8ec25..03302d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -399,10 +399,6 @@ else
 
      if test "x$have_libz" = "xno"; then
         AC_CHECK_HEADERS(zlib.h,
-            [SAVE_LDFLAGS="${LDFLAGS}"
-           if test "x${Z_DIR}" != "x"; then
-               LDFLAGS="${LDFLAGS} -L${Z_DIR}/lib"
-           fi
             AC_CHECK_LIB(z, gzread,[
                 have_libz=yes
                 if test "x${Z_DIR}" != "x"; then
@@ -417,7 +413,7 @@ else
                     Z_LIBS="-lz"
                 fi],
                 [have_libz=no])
-             LDFLAGS="${SAVE_LDFLAGS}"])
+             )
     else
        # we still need to check for zlib.h header
        AC_CHECK_HEADERS([zlib.h])
@@ -453,8 +449,6 @@ else
      # private dependencies, though, so static linking may fail.
      if test "x$have_liblzma" = "xno"; then
          AC_CHECK_HEADERS(lzma.h,
-           [SAVE_LDFLAGS="${LDFLAGS}"
-            LDFLAGS="-L${LZMA_DIR}/lib"
             AC_CHECK_LIB(lzma, lzma_code,[
                 have_liblzma=yes
                 if test "x${LZMA_DIR}" != "x"; then
@@ -464,7 +458,7 @@ else
                     LZMA_LIBS="-llzma"
                 fi],
                 [have_liblzma=no])
-            LDFLAGS="${SAVE_LDFLAGS}"])
+            )
     else
        # we still need to check for lzma,h header
        AC_CHECK_HEADERS([lzma.h])