Add libconfig as a disabled package

disabled-packages/libconfig/Makefile.in.patch

@@ -0,0 +1,14 @@
+Tests doesn't work when cross compiling.
+
+diff -u -r ../libconfig-1.5/Makefile.in ./Makefile.in
+--- ../libconfig-1.5/Makefile.in	2014-05-28 01:54:57.000000000 -0400
++++ ./Makefile.in	2016-01-19 17:58:57.829691367 -0500
+@@ -337,7 +337,7 @@
+ top_builddir = @top_builddir@
+ top_srcdir = @top_srcdir@
+ ACLOCAL_AMFLAGS = -I m4
+-SUBDIRS = lib doc tinytest tests $(am__append_1)
++SUBDIRS = lib doc tinytest $(am__append_1)
+ EXTRA_DIST = \
+ 	m4/*.m4 \
+ 	*.sln \

disabled-packages/libconfig/build.sh

@@ -0,0 +1,6 @@
+# Builds, but currently not used by anything (ldc package may use it in the future).
+TERMUX_PKG_HOMEPAGE=http://www.hyperrealm.com/libconfig/
+TERMUX_PKG_DESCRIPTION="Library for processing structured configuration files"
+TERMUX_PKG_VERSION=1.5
+TERMUX_PKG_SRCURL=http://www.hyperrealm.com/libconfig/libconfig-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_FOLDERNAME=libconfig-${TERMUX_PKG_VERSION}