Add automatic tests for Tick Processor.

test/mjsunit/tools/tickprocessor-test.ignore-unknown

+Statistical profiling result from v8.log, (13 ticks, 2 unaccounted, 0 excluded).
+
+ [Shared libraries]:
+   ticks  total  nonlib   name
+      2   18.2%    0.0%  /lib32/libm-2.7.so
+      1    9.1%    0.0%  ffffe000-fffff000
+
+ [JavaScript]:
+   ticks  total  nonlib   name
+      1    9.1%   12.5%  LazyCompile: exp native math.js:41
+
+ [C++]:
+   ticks  total  nonlib   name
+      2   18.2%   25.0%  v8::internal::Runtime_Math_exp(v8::internal::Arguments)
+      1    9.1%   12.5%  v8::internal::JSObject::LocalLookupRealNamedProperty(v8::internal::String*, v8::internal::LookupResult*)
+      1    9.1%   12.5%  v8::internal::HashTable<v8::internal::StringDictionaryShape, v8::internal::String*>::FindEntry(v8::internal::String*)
+      1    9.1%   12.5%  fegetexcept
+      1    9.1%   12.5%  exp
+
+ [GC]:
+   ticks  total  nonlib   name
+      0    0.0%
+
+ [Bottom up (heavy) profile]:
+  Note: percentage shows a share of a particular caller in the total
+  amount of its parent calls.
+  Callers occupying less than 2.0% are not shown.
+
+   ticks parent  name
+      2   18.2%  v8::internal::Runtime_Math_exp(v8::internal::Arguments)
+      2  100.0%    LazyCompile: exp native math.js:41
+      2  100.0%      Script: exp.js
+
+      2   18.2%  /lib32/libm-2.7.so
+      2  100.0%    LazyCompile: exp native math.js:41
+      2  100.0%      Script: exp.js
+
+      1    9.1%  v8::internal::JSObject::LocalLookupRealNamedProperty(v8::internal::String*, v8::internal::LookupResult*)
+      1  100.0%    Script: exp.js
+
+      1    9.1%  v8::internal::HashTable<v8::internal::StringDictionaryShape, v8::internal::String*>::FindEntry(v8::internal::String*)
+      1  100.0%    Script: exp.js
+
+      1    9.1%  ffffe000-fffff000
+
+      1    9.1%  fegetexcept
+      1  100.0%    LazyCompile: exp native math.js:41
+      1  100.0%      Script: exp.js
+
+      1    9.1%  exp
+      1  100.0%    LazyCompile: exp native math.js:41
+      1  100.0%      Script: exp.js
+
+      1    9.1%  LazyCompile: exp native math.js:41
+      1  100.0%    Script: exp.js
+