Fix sym-upload-v2 whitespace in filenames.

- Checking symbol status would fail for files whose names contained spaces, because the file name was being put in the URL unescaped.
- Now the filename is escaped before being put in URL when checking symbol status.

Change-Id: I3b989d877e0fd9aef57ec13bdbbb6c3dacb6a9e2
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2339782
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>

src/common/mac/SymbolCollectorClient.m

@@ -70,11 +70,16 @@
                                withAPIKey:(NSString*)APIKey
                             withDebugFile:(NSString*)debugFile
                               withDebugID:(NSString*)debugID {
+  NSString* escapedDebugFile =
+      [debugFile stringByAddingPercentEncodingWithAllowedCharacters:
+                     [NSCharacterSet URLHostAllowedCharacterSet]];
+
   NSURL* URL = [NSURL
       URLWithString:[NSString
                         stringWithFormat:@"%@/v1/symbols/%@/%@:checkStatus"
                                          @"?key=%@",
-                                         APIURL, debugFile, debugID, APIKey]];
+                                         APIURL, escapedDebugFile, debugID,
+                                         APIKey]];
 
   HTTPGetRequest* getRequest = [[HTTPGetRequest alloc] initWithURL:URL];
   NSError* error = nil;