Change debian package build rules to drop GYP

tools/linux_dist_support/debian/rules

 #!/usr/bin/make -f
 export DH_VERBOSE = 1
 
 # Use DEB_BUILD_OPTIONS's parallel=n option (see Policy 4.9.1)
 ifneq (,$(findstring parallel,$(DEB_BUILD_OPTIONS)))
 PARALLEL_JOBS := $(shell echo $(DEB_BUILD_OPTIONS) | \
         sed -e 's/.*parallel=\([0-9]\+\).*/\1/')
 else
 PARALLEL_JOBS := 1
 endif
@@ skipping 29 matching lines @@
 
 override_dh_auto_clean:
         echo $(DEB_BUILD_OPTIONS)
         rm -fr dart/out dart/Makefile
         find . -name *.tmp -execdir rm -f {} \;
         find . -name *.pyc -execdir rm -f {} \;
         find . -name *.mk -execdir rm -f {} \;
         find . -name *.Makefile -execdir rm -f {} \;
 
 override_dh_auto_configure:
-        GYP_GENERATORS=make python dart/tools/gyp_dart.py all
+        python dart/tools/generate_buildfiles.py
 
 override_dh_auto_build:
         cd dart; \
         python tools/build.py -v -m release -a $(ARCH) $(TOOLCHAIN) create_sdk; \
         cd ..
 
 # Building the Dart SDK will already strip all binaries.
 override_dh_strip:
 
 # This override allows us to ignore spurious missing library errors when
 # cross-compiling.
 override_dh_shlibdeps:
         dh_shlibdeps --dpkg-shlibdeps-params=--ignore-missing-info
 
 override_dh_auto_install:
         mkdir -p debian/tmp/out
         cp -R dart/out/$(BUILD_TYPE)/dart-sdk debian/tmp/out
         mv debian/tmp/out/dart-sdk debian/tmp/out/dart
         dh_install
         dh_link