[Arm]: Simplify compile-time Arm feature detection.

Makefile

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 169 matching lines @@
   GYPFLAGS += -Darm_float_abi=$(armfloatabi)
 endif
 # armthumb=on/off
 ifeq ($(armthumb), off)
   GYPFLAGS += -Darm_thumb=0
 else
 ifeq ($(armthumb), on)
   GYPFLAGS += -Darm_thumb=1
 endif
 endif
-# armtest=on
+# arm_test_noprobe=on
 # With this flag set, by default v8 will only use features implied
 # by the compiler (no probe). This is done by modifying the default
 # values of enable_armv7, enable_vfp3, enable_32dregs and enable_neon.
 # Modifying these flags when launching v8 will enable the probing for
 # the specified values.
-# When using the simulator, this flag is implied.
-ifeq ($(armtest), on)
-  GYPFLAGS += -Darm_test=on
+ifeq ($(arm_test_noprobe), on)
+  GYPFLAGS += -Darm_test_noprobe=on
 endif
 
 # ----------------- available targets: --------------------
 # - "dependencies": pulls in external dependencies (currently: GYP)
 # - "grokdump": rebuilds heap constants lists used by grokdump
 # - any arch listed in ARCHES (see below)
 # - any mode listed in MODES
 # - every combination <arch>.<mode>, e.g. "ia32.release"
 # - "native": current host's architecture, release mode
 # - any of the above with .check appended, e.g. "ia32.release.check"
@@ skipping 257 matching lines @@
         svn checkout --force http://gyp.googlecode.com/svn/trunk build/gyp \
             --revision 1831
         svn checkout --force \
             https://src.chromium.org/chrome/trunk/deps/third_party/icu46 \
             third_party/icu --revision 258359
         ( test -d buildtools || \
           git clone https://chromium.googlesource.com/chromium/buildtools.git; \
           cd buildtools; \
           git fetch origin; \
           git checkout 5d89977ce55240995d1596fe420b818468f5ec37 )