Bug 1493017 - Tweak vscode tasks.json problemMatcher regexes to handl…

…e clang/Windows output - r=jya

The original regex could match linux&mac outputs that look like:
`/[...]/ffmpeg/FFmpegVideoDecoder.cpp:315:6: error: expected expression`
However on Windows the same outputs have a different line&column format:
`c:/[...]/ffmpeg/FFmpegVideoDecoder.cpp(315,7): error: expected expression`

Differential Revision: https://phabricator.services.mozilla.com/D6442

.vscode/tasks.json

@@ -31,7 +31,7 @@
           "owner": "cpp",
           "fileLocation": "absolute",
           "pattern": {
-            "regexp": "^.*?([^\\s]*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
+            "regexp": "^.*?([^\\s]*)[:(](\\d+)[:,](\\d+)[)]?:\\s+(warning|error):\\s+(.*)$",
             "file": 1,
             "line": 2,
             "column": 3,
@@ -52,7 +52,7 @@
           "owner": "cpp",
           "fileLocation": "absolute",
           "pattern": {
-            "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
+            "regexp": "^(.*)[:(](\\d+)[:,](\\d+)[)]?:\\s+(warning|error):\\s+(.*)$",
             "file": 1,
             "line": 2,
             "column": 3,
@@ -77,7 +77,7 @@
           "owner": "cpp",
           "fileLocation": "absolute",
           "pattern": {
-            "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
+            "regexp": "^(.*)[:(](\\d+)[:,](\\d+)[)]?:\\s+(warning|error):\\s+(.*)$",
             "file": 1,
             "line": 2,
             "column": 3,