Back off the minimum required automake version to 1.11.  There isn't
anything in libtiff currently that actually requires 1.12, and changing
this allows the package to be built on pre-F18 machines for easier testing.

This patch can go away once we no longer care about testing on pre-F18.


diff -Naur tiff-4.0.3.orig/Makefile.am tiff-4.0.3/Makefile.am
--- tiff-4.0.3.orig/Makefile.am	2012-09-20 09:22:47.000000000 -0400
+++ tiff-4.0.3/Makefile.am	2012-10-30 11:33:30.312823564 -0400
@@ -25,7 +25,7 @@
 
 docdir = $(LIBTIFF_DOCDIR)
 
-AUTOMAKE_OPTIONS = 1.12 dist-zip foreign
+AUTOMAKE_OPTIONS = 1.11 dist-zip foreign
 ACLOCAL_AMFLAGS = -I m4
 
 docfiles = \
diff -Naur tiff-4.0.3.orig/test/Makefile.am tiff-4.0.3/test/Makefile.am
--- tiff-4.0.3.orig/test/Makefile.am	2012-09-20 09:22:28.000000000 -0400
+++ tiff-4.0.3/test/Makefile.am	2012-10-30 11:33:17.109696812 -0400
@@ -23,7 +23,7 @@
 
 # Process this file with automake to produce Makefile.in.
 
-AUTOMAKE_OPTIONS = 1.12 color-tests parallel-tests foreign
+AUTOMAKE_OPTIONS = 1.11 color-tests parallel-tests foreign
 
 LIBTIFF = $(top_builddir)/libtiff/libtiff.la