libebml: needs wchar support

Fixes:

  http://autobuild.buildroot.org/results/83a/83af643e377f53feea044eb6fe1447f7ea502612/

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

package/libebml/Config.in

@@ -1,11 +1,12 @@
 config BR2_PACKAGE_LIBEBML
 	bool "libebml"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR
 	help
 	  Access library for the EBML (Extensible Binary Meta
 	  Language, a binary derivative of XML) format.
 
 	  http://matroska.org
 
-comment "libebml needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+comment "libebml needs a toolchain w/ C++, wchar"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR

package/libmatroska/Config.in

@@ -2,11 +2,12 @@ config BR2_PACKAGE_LIBMATROSKA
 	bool "libmatroska"
 	select BR2_PACKAGE_LIBEBML
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR
 	help
 	  Extensible open standard audio/video container format access
 	  library.
 
 	  http://matroska.org
 
-comment "libmatroska needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+comment "libmatroska needs a toolchain w/ C++, wchar"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR