Modify Debian package versions to work with Ubuntu Xenial

Check build dependencies on DebianPlatform initialization
Update BUILDING.md with Ubuntu info
Remove old Ubuntu files

BUILDING.md

@@ -25,7 +25,7 @@ Building is done by simply invoking a Python script like `build.py`. It will tak
 
 ## Debian and derivatives
 
-As of now, only Debian Stretch 64-bit is tested. Ubuntu Xenial 64-bit support will come soon.
+As of now, Debian Stretch 64-bit and Ubuntu Xenial 64-bit are tested.
 This may work on other Debian-based distributions and 32-bit systems
 
 **Note for Debian Jessie users**: ungoogled-chromium is configured to build against the system's [FFmpeg](//www.ffmpeg.org/) (available in Stretch and onwards); [Libav](//libav.org) (used in Jessie) will not work. However, FFmpeg is available in `jessie-backports`. To install it, add `jessie-backports` to the apt sources, and then install `libavutil-dev`, `libavcodec-dev`, and `libavformat-dev` from it. Note that this will replace Libav.

buildlib/debian.py

@@ -56,6 +56,16 @@ def __init__(self, *args, **kwargs):
             "QUILT_SERIES": str(self.PATCH_ORDER)
         }
 
+        self.logger.info("Checking build dependencies...")
+        if not self._dpkg_checkbuilddeps():
+            raise Exception("Build dependencies not met")
+
+    def _dpkg_checkbuilddeps(self):
+        result = subprocess.run(["dpkg-checkbuilddeps", str(self.DPKG_DIR / pathlib.Path("control"))])
+        if not result.returncode == 0:
+            return False
+        return True
+
     def _get_dpkg_changelog_datetime(self, override_datetime=None):
         if override_datetime is None:
             current_datetime = datetime.date.today()

resources/debian/dpkg_dir/control

@@ -60,12 +60,12 @@ Build-Depends:
  libsnappy-dev,
  libgconf2-dev,
  libavutil-dev,
- libavcodec-dev (>= 7:3.0),
+ libavcodec-dev (>= 7),
  libavformat-dev,
  libasound2-dev,
  libsqlite3-dev,
  libjsoncpp-dev,
- libspeechd-dev (>= 0.8.4),
+ libspeechd-dev (>= 0.8.3),
  libminizip-dev,
  libhunspell-dev,
  libmodpbase64-dev,
@@ -78,8 +78,6 @@ Build-Depends:
  libjs-excanvas,
  libjs-jquery-flot,
  libgcrypt20-dev,
- fonts-ipafont-gothic,
- fonts-ipafont-mincho,
 Standards-Version: 3.9.7
 
 Package: chromium