Makefile: add target awareness to install markers and build rules (with fallback to default rule)
add mingw-w64 runtime (32 & 64 bit targets)
various packages: fix or disable mingw-w64 builds
Makefile: build targets serially to gracefully handle parallel and settings options
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
package wxwidgets: enable x86_64-w64-mingw32 build
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
doc update: add libffi to requirements list
package gnutls: rebased patches