Fix llvm/polly build for --disable-shared

Fix POLLY_LIB when both gmp and cloog are built with --disable-shared.
The reasons for --disable-shared are:
1. gmp can't be built in MacOSX without it
2. dynamic gmp and cloog libraries need user's explicit overriding
   LD_LIBRARY_PATH

Change-Id: I2604011f08d1910d9e983f9a4002a71d07f2e1be
Fix mingw compilation

Replace pipe missing from i586-mingw32msvc with _pipe

Also remove svn.log

Change-Id: Iae0b61a13b3b69e97c877d292dd511d900a208b8