Rename autotools constants to fall in line with the rest of crew (#10442)

* Rename CREW_OPTIONS to CREW_CONFIGURE_OPTIONS

* Rename build_extras and install_extras to configure_build_extras and configure_install_extras

packages/grep.rb

@@ -26,7 +26,7 @@ class Grep < Package
 
   def self.build
     system "CPPFLAGS=-DHAVE_DYNAMIC_LIBPCRE \
-      ./configure #{CREW_OPTIONS} \
+      ./configure #{CREW_CONFIGURE_OPTIONS} \
       --without-included-regex"
     system 'make'
   end