luajit: Add pkg-config script

* Only needed for 5.1 compat

dev-lang/luajit/luajit-2.0.2.recipe

@@ -2,7 +2,7 @@ SUMMARY="LuaJIT is a Just-In-Time Compiler (JIT) for the Lua programming languag
 HOMEPAGE="http://luajit.org/luajit.html"
 SRC_URI="http://luajit.org/download/LuaJIT-$portVersion.tar.gz"
 CHECKSUM_MD5="112dfb82548b03377fbefbba2e0e3a5b"
-REVISION="1"
+REVISION="2"
 ARCHITECTURES="x86 x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 PROVIDES="
@@ -46,7 +46,14 @@ INSTALL()
 		INSTALL_MAN="$manDir/man1" INSTALL_LMOD="$dataDir/lua/5.1"
 
 	ln -s $libDir/libluajit-5.1.so.2.0.2 $libDir/libluajit-5.1.so.2
+
+	# the pkg-config is for 5.1 comapt
+	mkdir -p $libDir/pkgconfig
+	cp etc/luajit.pc $libDir/pkgconfig/luajit.pc
+
 	prepareInstalledDevelLib libluajit-5.1
+	fixPkgconfig
+
 	packageEntries devel $developDir
 }
 LICENSE="MIT"