TT#53701 Fix perms for files

Add executable bits for scripts. And remove them for assets.

We do this once in the repo and can then remove the code to do it
everytime at build-time via a dh_fixperms override.

Change-Id: I190123d8f7120e3684c1ecf7915b51ef946b950f

debian/rules

@@ -7,8 +7,3 @@
 
 override_dh_auto_install:
 	dh_auto_install --destdir=debian/ngcp-panel
-
-override_dh_fixperms:
-	dh_fixperms
-	find debian/ngcp-panel/usr/share/ngcp-panel/static \
-		-type f -exec chmod 644 {} \;