qt5 packages: use qtbase variables
Merge pull request #260 from mabrand/use-qtbase

qt5 packages: use qtbase variables
update package gcc
update package libass
update package sqlite
doc update: add Arch Linux user repository related project
update package lame
update package mingw-w64 and switch to release version
doc update: add Arch Linux user repository related project
Merge branch 'stable'
package gcc: remove redundant darwin patch
packages gettext libiconv: remove unnecessary native builds
gcc support libraries: build separately in own package rules
add packages cloog isl and use for gcc optimisations
package ffmpeg: disable libnut on i686-pc-mingw32
package qtbase: mingw-w64 fixes
Makefile: allow bypassing check-requirements
package wxwidgets: mingw-w64 fixes
package wget: mingw-w64 cdecl fix
package boost: mingw-w64 intrinsics fix