move Environment.parse_makefile_deps to Util

spec/rscons/environment_spec.rb

@@ -255,24 +255,5 @@ module Rscons
         expect(subject.__send__(:features_met?, builder, %w[-shared])).to be_falsey
       end
     end
-
-    describe ".parse_makefile_deps" do
-      it 'handles dependencies on one line' do
-        expect(File).to receive(:read).with('makefile').and_return(<<EOS)
-module.o: source.cc
-EOS
-        expect(Environment.parse_makefile_deps('makefile')).to eq ['source.cc']
-      end
-
-      it 'handles dependencies split across many lines' do
-        expect(File).to receive(:read).with('makefile').and_return(<<EOS)
-module.o: module.c \\
-  module.h \\
-  other.h
-EOS
-        expect(Environment.parse_makefile_deps('makefile')).to eq [
-          'module.c', 'module.h', 'other.h']
-      end
-    end
   end
 end

spec/rscons/util_spec.rb

@@ -111,5 +111,24 @@ module Rscons
       end
     end
 
+    describe ".parse_makefile_deps" do
+      it 'handles dependencies on one line' do
+        expect(File).to receive(:read).with('makefile').and_return(<<EOS)
+module.o: source.cc
+EOS
+        expect(Util.parse_makefile_deps('makefile')).to eq ['source.cc']
+      end
+
+      it 'handles dependencies split across many lines' do
+        expect(File).to receive(:read).with('makefile').and_return(<<EOS)
+module.o: module.c \\
+  module.h \\
+  other.h
+EOS
+        expect(Util.parse_makefile_deps('makefile')).to eq [
+          'module.c', 'module.h', 'other.h']
+      end
+    end
+
   end
 end