Update pencil-util submodule.

Change-Id: If8568e6fab2b8e92cbfd03a518931d02686c5564
Merge pull request #4 from Meinersbur/master

Rename attribute 'access' to 'pencil_access'
Add pencil-util information to the README.

Change-Id: I1d91959432dc6c93764288fa0bf1cf4a388bbe42
Link with math library in testsuite.

Change-Id: I5a6fd7d0217e7cc54c8947a1df9500bfe0d57268
Check for static function in forward declarations.

static void foo();

voif foo(){}

is forbidden now.

Change-Id: Id172b30cadf409e608eafa2615bde13466a226a6
Don't explicitly walk summary function.

Change-Id: Ibb540f715e1a4560b60c6f7f8aadb7f676b2e6bb
Preserve access functions in optimizer.

Change-Id: I349617c66a778b29c6497a2cb178dbac68c3d158
Allow implicit conversion from int to bool.

Change-Id: I83c68008c55a02dfaad2e42cbc374035c1fbcd9c
Preserve function prototypes for non-header functions.

Function prototypes, not declared in header files (supplied by
--include options) are preserved.

Change-Id: Ic5972c11fce834c1f248caaecf482fa35a8ec97f
Order of libs to link matters