Add libsodium source

libsodium-1.0.18-RELEASE/Makefile.am

@@ -0,0 +1,24 @@
+ACLOCAL_AMFLAGS = -I m4
+
+EXTRA_DIST = \
+	autogen.sh \
+	libsodium.sln \
+	libsodium.vcxproj \
+	libsodium.vcxproj.filters \
+	LICENSE \
+	README.markdown \
+	THANKS
+
+SUBDIRS = \
+	builds \
+	contrib \
+	dist-build \
+	msvc-scripts \
+	src \
+	test
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = @PACKAGE_NAME@.pc
+
+DISTCLEANFILES = $(pkgconfig_DATA)
+