Disable the new pngfix and png-fix-itxt tools: they take up space, fail to
build on some oddball toolchain configurations and aren't expected/needed
in a non-interactive embedded system.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

diff -Nura libpng-1.6.6.orig/Makefile.am libpng-1.6.6/Makefile.am
--- libpng-1.6.6.orig/Makefile.am	2013-10-27 19:13:39.183376955 -0300
+++ libpng-1.6.6/Makefile.am	2013-10-27 19:13:50.388744191 -0300
@@ -10,7 +10,7 @@
 check_PROGRAMS= pngtest pngunknown pngstest pngvalid
 
 # Utilities - installed
-bin_PROGRAMS= pngfix png-fix-itxt
+bin_PROGRAMS=
 
 pngtest_SOURCES = pngtest.c
 pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
diff -Nura libpng-1.6.6.orig/Makefile.in libpng-1.6.6/Makefile.in
--- libpng-1.6.6.orig/Makefile.in	2013-10-27 19:13:39.180376856 -0300
+++ libpng-1.6.6/Makefile.in	2013-10-27 19:14:55.332872643 -0300
@@ -59,7 +59,7 @@
 host_triplet = @host@
 check_PROGRAMS = pngtest$(EXEEXT) pngunknown$(EXEEXT) \
 	pngstest$(EXEEXT) pngvalid$(EXEEXT)
-bin_PROGRAMS = pngfix$(EXEEXT) png-fix-itxt$(EXEEXT)
+bin_PROGRAMS =
 @PNG_ARM_NEON_TRUE@am__append_1 = arm/arm_init.c\
 @PNG_ARM_NEON_TRUE@	arm/filter_neon.S