[docs] small fix for debugging.md

use_debug_fission=false doesn't split debug info.

Change-Id: Ib8def944dfcea1345f41284e9d125c082071848c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526826Reviewed-by: Minoru Chikamune <chikamune@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826106}

docs/linux/debugging.md

@@ -316,7 +316,7 @@ See
 https://groups.google.com/a/chromium.org/forum/#!searchin/chromium-dev/gdb-add-index/chromium-dev/ELRuj1BDCL4/5Ki4LGx41CcJ
 for more info.
 
-You can improve GDB load time significantly at the cost of link time by
+You can improve GDB load time significantly at the cost of link time by not
 splitting symbols from the object files. In GN, set `use_debug_fission=false` in
 your "gn args".