add build script for luajit and pcre

packages/l/luajit/xmake.lua

@@ -18,3 +18,12 @@ package("luajit")
         os.cd("src")
         os.vrun("msvcbuild.bat")
     end)
+
+    on_build(function (package)
+        os.vrun("./configure --prefix=%s", package:installdir())
+        os.vrun("make")
+    end)
+
+    on_install(function (package)
+        os.vrun("make install")
+    end)

packages/p/pcre/xmake.lua

@@ -9,4 +9,11 @@ package("pcre")
     add_versions("8.40", "99e19194fa57d37c38e897d07ecb3366b18e8c395b36c6d555706a7f1df0a5d4")
     add_versions("8.41", "0e914a3a5eb3387cad6ffac591c44b24bc384c4e828643643ebac991b57dfcc5")
 
+    on_build(function (package)
+        os.vrun("./configure --prefix=%s", package:installdir())
+        os.vrun("make")
+    end)
 
+    on_install(function (package)
+        os.vrun("make install")
+    end)