Change halfway-to-the-max GC trigger to measure committed pages, not allocated objects

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 4b3ae5dd7c3e0d6332370cd4b4f8ba1fd3e71309..646d4461ede3fd27373896d8e2b3eedb7db4eb47 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -257,6 +257,13 @@
 }],  # 'byteorder == big'
 
 ##############################################################################
+['arch == arm64 or arch == android_arm64 or arch == mips64el or arch == nacl_x64 or arch == x64 or arch == ppc64', {
+  # These tests are tuned for 32 bit, ie the max heap size is set so low they
+  # can't run on 64 bit platforms.
+  'gc-early-with-fragmentation': [SKIP],
+}],
+
+##############################################################################
 ['arch == arm64 or arch == android_arm64', {
 
   # arm64 TF timeout.
@@ -406,6 +413,7 @@
   'regress/regress-2790': [PASS, SLOW],
   'regress/regress-json-stringify-gc': [PASS, SLOW],
   'regress/regress-1122': [PASS, SLOW],
+  'gc-early-with-fragmentation': [PASS, ['mode == debug', SKIP]],
 }],  # 'arch == arm or arch == android_arm'
 
 ##############################################################################
@@ -415,6 +423,7 @@
   'try': [PASS, ['mode == debug', SKIP]],
   'debug-scripts-request': [PASS, ['mode == debug', SKIP]],
   'array-constructor': [PASS, ['mode == debug', SKIP]],
+  'gc-early-with-fragmentation': [PASS, ['mode == debug', SKIP]],
 
   # Times out often in release mode on MIPS.
   'compiler/regress-stacktrace-methods': [PASS, ['mode == release', TIMEOUT]],