Update mingw-w64 repository links
Merge pull request #207 from Alexpux/develop

Update mingw-w64 repository links
GCC-4.8.1 add lost patch. Add two new patches.
Prepare to move to MSYS2:
 - Set MSYSTEM variable at start
 - Fix run tests from current directory.
Merge pull request #208 from Alexpux/develop

Add lost patch for GCC-4.8.1. Fix some issues for MSYS2
Fix building binutils docs with texinfo-5.1
Merge pull request #209 from Alexpux/develop

Fix building binutils docs with texinfo-5.1
Under MSYS2:
 - use english language to show messages.
 - PROCESSOR_ARCHITECTURE.
Merge pull request #210 from Alexpux/develop

Under MSYS2:
Update bogus Python patch. Part 1.
Merge pull request #211 from Alexpux/develop

Update bogus Python patch. Part 1.
Add ADA, OBJC and OBJ-C++ languages for building.
Add function to check existence of command. Check 7za when compressing.
Merge pull request #212 from Alexpux/develop

Add languages. Add command check function. Made checking 7za for both old and new MSYS.
Update bogus Python patch. Part 2.
Merge pull request #213 from Alexpux/develop

Update bogus Python patch. Part 2.
With MSYS2 we can build GCC with many jobs without fork errors. Need to install GCC with one job.
PATH doesn't need prefix/bin before finishing new GCC.
Merge pull request #214 from Alexpux/develop

Small changes
Update ISL to 0.12