[ninjalog_uploader] Exclude -p ninja option from targets metrics

Some records include '-p' as a target in the ninja metrics.

Bug: b/270907050
Change-Id: I4040db5793e682eaa48242bc27756c91d05ad320
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4302230
Auto-Submit: Junji Watanabe <jwata@google.com>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>

ninjalog_uploader.py

@@ -80,7 +80,7 @@ def GetBuildTargetFromCommandLine(cmdline):
 
   # Skipping all args that involve these flags, and taking all remaining args
   # as targets.
-  onearg_flags = ('-C', '-f', '-j', '-k', '-l', '-d', '-t', '-w')
+  onearg_flags = ('-C', '-d', '-f', '-j', '-k', '-l', '-p', '-t', '-w')
   zeroarg_flags = ('--version', '-n', '-v')
 
   targets = []