libunistring: new package

[Thomas:
  - adjust the title of the commit
  - remove the thread dependency, by using the --disable-threads
    option when needed
  - remove LIBUNISTRING_SOURCE, since its value was the default
  - use BR2_GNU_MIRROR in LIBUNISTRING_SITE
  - adjust the license, which really is LGPLv3+, not LGPLv2. The
    license file is COPYING.LIB.]

Signed-off-by: Pedro Aguilar <paguilar@paguilar.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -907,6 +907,7 @@ menu "Other"
 	source "package/startup-notification/Config.in"
 	source "package/tz/Config.in"
 	source "package/tzdata/Config.in"
+	source "package/libunistring/Config.in"
 endmenu
 
 menu "Security"

package/libunistring/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_LIBUNISTRING
+	bool "libunistring"
+	help
+	  The libunistring library provides functions for manipulating
+	  Unicode strings and for manipulating C strings according to
+	  the Unicode standard.
+
+	  http://www.gnu.org/software/libunistring/

package/libunistring/libunistring.mk

@@ -0,0 +1,19 @@
+################################################################################
+#
+# libunistring
+#
+################################################################################
+
+LIBUNISTRING_VERSION = 0.9.4
+LIBUNISTRING_SITE = $(BR2_GNU_MIRROR)/libunistring
+LIBUNISTRING_INSTALL_STAGING = YES
+LIBUNISTRING_LICENSE = LGPLv3+
+LIBUNISTRING_LICENSE_FILES = COPYING.LIB
+
+ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
+LIBUNISTRING_CONF_OPTS += --enable-threads=posix
+else
+LIBUNISTRING_CONF_OPTS += --disable-threads
+endif
+
+$(eval $(autotools-package))