Auto merge of #24754 - asajeffrey:gstplugin, r=ferjm

Add a gstreamer servosrc plugin

<!-- Please describe your changes on the following line: -->

A first draft of a gstreamer plugin. Lots of stuff to fix, most importantly that it should write to GL memory, not do readback. But it's a start!

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because it's a new platform

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

2 files changed, 4 insertions, 4 deletions

diff --git a/python/servo/bootstrap.py b/python/servo/bootstrap.py
index f65284073e9..e191798cac5 100644
--- a/python/servo/bootstrap.py
+++ b/python/servo/bootstrap.py
@@ -49,7 +49,7 @@ def install_trusty_deps(force):
 
 
 def check_gstreamer_lib():
-    return subprocess.call(["pkg-config", "--atleast-version=1.14", "gstreamer-1.0"],
+    return subprocess.call(["pkg-config", "--atleast-version=1.16", "gstreamer-1.0"],
                            stdout=PIPE, stderr=PIPE) == 0
 
 
diff --git a/python/servo/command_base.py b/python/servo/command_base.py
index 5a8818333a9..e6b3ec7908b 100644
--- a/python/servo/command_base.py
+++ b/python/servo/command_base.py
@@ -583,10 +583,10 @@ class CommandBase(object):
                 return True
             else:
                 raise Exception("Your system's gstreamer libraries are out of date \
-(we need at least 1.12). Please run ./mach bootstrap-gstreamer")
+(we need at least 1.16). Please run ./mach bootstrap-gstreamer")
         else:
                 raise Exception("Your system's gstreamer libraries are out of date \
-(we need at least 1.12). If you're unable to \
+(we need at least 1.16). If you're unable to \
 install them, let us know by filing a bug!")
         return False
 
@@ -679,7 +679,7 @@ install them, let us know by filing a bug!")
             # we append in the reverse order so that system gstreamer libraries
             # do not get precedence
             extra_path = [libpath] + extra_path
-            extra_lib = [libpath] + extra_path
+            extra_lib = [libpath] + extra_lib
             append_to_path_env(path.join(libpath, "pkgconfig"), env, "PKG_CONFIG_PATH")
 
         if sys.platform == "linux2":