[gcmole] Fix gcmole after property change

The build location is now universally in out/build after infra change:
https://crrev.com/c/2426643

TBR=mslekova@chromium.org

Bug: chromium:1132088
Change-Id: I0d8867ed58adec79ed66f5e4dac375827e2679e3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2448451Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70296}

tools/gcmole/gcmole.lua

@@ -115,7 +115,7 @@ local function MakeClangCommandLine(
       .. " -DV8_INTL_SUPPORT"
       .. " -I./"
       .. " -Iinclude/"
-      .. " -Iout/Release/gen"
+      .. " -Iout/build/gen"
       .. " -Ithird_party/icu/source/common"
       .. " -Ithird_party/icu/source/i18n"
       .. " " .. arch_options

tools/gcmole/run-gcmole.py

@@ -21,9 +21,9 @@ BASE_PATH = os.path.dirname(os.path.dirname(GCMOLE_PATH))
 
 assert len(sys.argv) == 2
 
-if not os.path.isfile("out/Release/gen/torque-generated/builtin-definitions.h"):
-  print("Expected generated headers in out/Release/gen.")
-  print("Either build v8 in out/Release or change gcmole.lua:115")
+if not os.path.isfile("out/build/gen/torque-generated/builtin-definitions.h"):
+  print("Expected generated headers in out/build/gen.")
+  print("Either build v8 in out/build or change gcmole.lua:115")
   sys.exit(-1)
 
 proc = subprocess.Popen(