Fix FTL Native Inlining for EFL

Fix FTL Native Inlining for EFL
https://bugs.webkit.org/show_bug.cgi?id=137774

Reviewed by Michael Saboff.

.:

Updated CMake for FTL Native Inlining.

* CMakeLists.txt:
* Source/cmake/FindClang.cmake: Added.
* Source/cmake/OptionsEfl.cmake:
* Source/cmakeconfig.h.cmake:

Source/JavaScriptCore:

Added required functionality for Native Inlining to EFL, and fixed a bug/typo in the original code,
which caused incorrect memory allocation.

* CMakeLists.txt:
* create-llvm-ir-from-source-file.py: Added.
* create-symbol-table-index.py: Added.
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::lower):
(JSC::FTL::LowerDFGToLLVM::getModuleByPathForSymbol):
(JSC::FTL::LowerDFGToLLVM::exitValueForAvailability):
(JSC::FTL::LowerDFGToLLVM::exitValueForNode):
* runtime/BundlePath.cpp: Added.
(JSC::bundlePath):
* runtime/JSDataViewPrototype.cpp:
(JSC::getData):
(JSC::setData):
* runtime/MathObject.cpp:

Source/WTF:

Updated guard definition for Native Inlining, and added an attribute define for marking functions
that should not be left out of the symbol table.

* wtf/Platform.h:

Tools:

Added Clang as an optional module to jhbuild.

* efl/jhbuild.modules:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@174940 268f45cc-cd09-0410-ab3c-d52691b4dbfc