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-1.6.10.orig/Makefile.am libpng-1.6.10/Makefile.am
--- libpng-1.6.10.orig/Makefile.am	2014-03-17 08:51:25.812005079 -0300
+++ libpng-1.6.10/Makefile.am	2014-03-17 09:14:28.807586433 -0300
@@ -10,7 +10,7 @@
 check_PROGRAMS= pngtest pngunknown pngstest pngvalid pngimage
 
 # Utilities - installed
-bin_PROGRAMS= pngfix png-fix-itxt
+bin_PROGRAMS=
 
 # This ensures that pnglibconf.h gets built at the start of 'make all' or
 # 'make check', but it does not add dependencies to the individual programs,
diff -Nura libpng-1.6.10.orig/Makefile.in libpng-1.6.10/Makefile.in
--- libpng-1.6.10.orig/Makefile.in	2014-03-17 08:51:25.807005070 -0300
+++ libpng-1.6.10/Makefile.in	2014-03-17 09:14:44.846617623 -0300
@@ -87,7 +87,7 @@
 host_triplet = @host@
 check_PROGRAMS = pngtest$(EXEEXT) pngunknown$(EXEEXT) \
 	pngstest$(EXEEXT) pngvalid$(EXEEXT) pngimage$(EXEEXT)
-bin_PROGRAMS = pngfix$(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 arm/filter_neon_intrinsics.c