Add support for opening classes.dex file from zip, jar, apk

Adding new ZipArchive class and test

	src/zip_archive.h
	src/zip_archive.cc
	src/zip_archive_test.cc
	build/Android.common.mk

Change from host only use of build dex file for libcore to using host
and target core.jar containing classes.dex files. This requires
setting up an ANDROID_DATA directory to containing an art-cache file
for the extracted dex files, similar to the dalvik-cache for odex
files. A unique ANDROID_DATA and art-cache is created and cleaned up
for each test run (similar to vogar).

	src/common_test.h

Add dependency for libcore jar files to test targets to support
RuntimeTest use of core.jar

	Android.mk

Extract common includes to ART_C_INCLUDES when adding zlib dependency

	build/Android.common.mk
	build/Android.libart.mk
	build/Android.test.mk

Adding TODO regarding unordered map for ClassLinker::classes_ table.

	src/class_linker.h

Adding DexFile::OpenZip (also changed OpenFile to take
	src/dex_file.cc
	src/dex_file.h

Adding kPageSize of 4096, validated by Runtime::Init

	src/globals.h
	src/runtime.cc

    Updated to use kPageSize where it seemed appropriate.

	src/jni_compiler.cc
	src/jni_compiler_test.cc
	src/space.cc
	src/thread.cc
	src/thread_x86.cc

Changed thread_list_ and class_linker_ to be declared in Runtime::Init
initialization order.

	src/runtime.h

Change-Id: Id626abe5b6c1990e4f93598256ee0fae000818f6
diff --git a/src/space.cc b/src/space.cc
index a0da45c..217c2ee 100644
--- a/src/space.cc
+++ b/src/space.cc
@@ -46,7 +46,7 @@
   if (!(startup_size_ <= maximum_size_)) {
     return false;
   }
-  size_t length = RoundUp(maximum_size_, 4096);
+  size_t length = RoundUp(maximum_size_, kPageSize);
   int prot = PROT_READ | PROT_WRITE;
   int flags = MAP_PRIVATE | MAP_ANONYMOUS;
   void* base = mmap(NULL, length, prot, flags, -1, 0);
@@ -103,8 +103,8 @@
 }
 
 void Space::DontNeed(void* start, void* end, void* num_bytes) {
-  start = (void*)RoundUp((uintptr_t)start, 4096);
-  end = (void*)RoundDown((uintptr_t)end, 4096);
+  start = (void*)RoundUp((uintptr_t)start, kPageSize);
+  end = (void*)RoundDown((uintptr_t)end, kPageSize);
   if (start >= end) {
     return;
   }