hub: fix hardcoded ruby path

rake hardcoded the path to ruby in the installed scripts, which breaks
the script when ruby is updated. Just use #!ruby for Haiku, as this
works fine and resists updates.

dev-vcs/hub/hub-1.12.4.recipe

@@ -6,7 +6,7 @@ all from the command line."
 HOMEPAGE="http://hub.github.com/"
 COPYRIGHT="2009-2014 Chris Wanstrath"
 LICENSE="MIT"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://github.com/github/hub/archive/v1.12.4.tar.gz"
 CHECKSUM_SHA256="b7fe404d7dc5f60554f088bec12de5e80229331430ea0ced46d5bf89ecae5117"
 
@@ -40,6 +40,8 @@ INSTALL()
 {
 	rake install PREFIX=$prefix
 
+	sed -i -e "s/#!.*ruby/#!ruby/" $binDir/hub
+
 	# Fixup some hardcoded paths…
 	mkdir -p $docDir
 	mv $prefix/share/man $manDir