package/vala: fix wrapper

Add double quotes around the $@ variable to prevent word splitting.

Reported-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Adam Duskett <Aduskett@gmail.com>
[yann.morin.1998@free.fr: s/globbing/word splitting/]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/vala/vala-wrapper

@@ -1,2 +1,2 @@
 #!/bin/sh
-$0-@VALA_VERSION@ --vapidir=${STAGING_DIR}/usr/share/vala/vapi --girdir=${STAGING_DIR}/usr/share/gir-1.0 $@
+$0-@VALA_VERSION@ --vapidir=${STAGING_DIR}/usr/share/vala/vapi --girdir=${STAGING_DIR}/usr/share/gir-1.0 "$@"