expat: drop 2.0.1, fix 2.1.0, add 2.1.1.

* Drop version 2.0.1.
* $manDir was both in primary and secondary arch packages, causing
  problems when uninstalling only one of them. Fixed by discarding
  $documentationDir for secondary arch.
* Reorder sections for 2.1.0.
* configure.in already has "AC_CONFIG_MACRO_DIR([m4])" so there is
  no need to append it in PATCH().
* Drop PATCH() and, instead, use a real patch to create Makefile.am
  otherwise /bin/haikuporter complains about untracked files.
* Add $secondaryArchSuffix to cmd:libtoolize in BUILD_PREREQUIRES.
* Add recipe for 2.1.1 with patch for gcc2.

dev-libs/expat/patches/expat-2.1.1.patchset

@@ -0,0 +1,31 @@
+From f255408fca0143fd70a68934ea02e2290b6c0908 Mon Sep 17 00:00:00 2001
+From: fbrosson <fbrosson@localhost>
+Date: Sat, 19 Mar 2016 10:11:53 +0000
+Subject: gcc2
+
+
+diff --git a/lib/xmlparse.c b/lib/xmlparse.c
+index e308c79..6a61508 100644
+--- a/lib/xmlparse.c
++++ b/lib/xmlparse.c
+@@ -1693,13 +1693,16 @@ XML_GetBuffer(XML_Parser parser, int len)
+   }
+ 
+   if (len > bufferLim - bufferEnd) {
++#ifdef XML_CONTEXT_BYTES
++    int keep;
++#endif
+     int neededSize = len + (int)(bufferEnd - bufferPtr);
+     if (neededSize < 0) {
+       errorCode = XML_ERROR_NO_MEMORY;
+       return NULL;
+     }
+ #ifdef XML_CONTEXT_BYTES
+-    int keep = (int)(bufferPtr - buffer);
++    keep = (int)(bufferPtr - buffer);
+ 
+     if (keep > XML_CONTEXT_BYTES)
+       keep = XML_CONTEXT_BYTES;
+-- 
+2.7.0
+