Upgrade libxml2 and its portage dependencies

sys-libs/zlib/files/zlib-1.2.1-fPIC.patch

Index: sys-libs/zlib/files/zlib-1.2.1-fPIC.patch
diff --git a/sys-libs/zlib/files/zlib-1.2.1-fPIC.patch b/sys-libs/zlib/files/zlib-1.2.1-fPIC.patch
new file mode 100644
index 0000000000000000000000000000000000000000..5ccbddfd0fbea0008abc87a5704b23ade48095ed
--- /dev/null
+++ b/sys-libs/zlib/files/zlib-1.2.1-fPIC.patch
@@ -0,0 +1,16 @@
+--- zlib-1.2.1/configure
++++ zlib-1.2.1/configure
+@@ -73,7 +73,12 @@
+ 
+ if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
+   CC="$cc"
+-  SFLAGS=${CFLAGS-"-fPIC -O3"}
++  #SFLAGS=${CFLAGS-"-fPIC -O3"}
++  # the above is horribly wrong on a few archs where -fPIC should ALWAYS be
++  # used in the creation of shared libraries. without the following, the
++  # shared lib test will sometimes fail even when shared libs -can- be created.
++  SFLAGS=${CFLAGS-"-O3"}
++  SFLAGS="${SFLAGS} -fPIC"
+   CFLAGS="$cflags"
+   case `(uname -s || echo unknown) 2>/dev/null` in
+   Linux | linux | GNU | GNU/*)