Use relative paths for api/p2p fuzzers.

BUG=
R=aizatsky@chromium.org
TBR=katrielc@webrtc.org

Review URL: https://codereview.webrtc.org/2053093002 .

Cr-Commit-Position: refs/heads/master@{#13095}
diff --git a/webrtc/test/fuzzers/BUILD.gn b/webrtc/test/fuzzers/BUILD.gn
index 319427a..09e3542 100644
--- a/webrtc/test/fuzzers/BUILD.gn
+++ b/webrtc/test/fuzzers/BUILD.gn
@@ -89,7 +89,7 @@
     "sdp_parser_fuzzer.cc",
   ]
   deps = [
-    "//webrtc/api:libjingle_peerconnection",
+    "../../api:libjingle_peerconnection",
   ]
 }
 
@@ -98,7 +98,7 @@
     "stun_parser_fuzzer.cc",
   ]
   deps = [
-    "//webrtc/p2p:rtc_p2p",
+    "../../p2p:rtc_p2p",
   ]
 }
 
@@ -107,7 +107,7 @@
     "stun_validator_fuzzer.cc",
   ]
   deps = [
-    "//webrtc/p2p:rtc_p2p",
+    "../../p2p:rtc_p2p",
   ]
 }