gn: fix documentation typo

s/currebt/current/

TBR=brettw

Review URL: https://codereview.chromium.org/1318963007

Cr-Commit-Position: refs/heads/master@{#347900}

tools/gn/docs/reference.md

@@ -1449,7 +1449,7 @@
 
   "abspath"
       The full absolute path name to the file or directory. It will be
-      resolved relative to the currebt directory, and then the source-
+      resolved relative to the current directory, and then the source-
       absolute version will be returned. If the input is system-
       absolute, the same input will be returned.
         "foo/bar.txt" => "//mydir/foo/bar.txt"

tools/gn/function_get_path_info.cc

@@ -174,7 +174,7 @@ const char kGetPathInfo_Help[] =
     "\n"
     "  \"abspath\"\n"
     "      The full absolute path name to the file or directory. It will be\n"
-    "      resolved relative to the currebt directory, and then the source-\n"
+    "      resolved relative to the current directory, and then the source-\n"
     "      absolute version will be returned. If the input is system-\n"
     "      absolute, the same input will be returned.\n"
     "        \"foo/bar.txt\" => \"//mydir/foo/bar.txt\"\n"