Fix the encoding of x86_imul_reg_mem_imm.
Disable a corlib test which hangs on windows.
[sgen] Add minimal mingw64 support.
Revert "Dump the managed threads on a crash. Include the tid and smallid of a thread in managed thread dumps."

This reverts commit 8bc5f346dad2a588278409135edab78f1b6093f4.
Revert "Added MONO_ROOT to enable the easy relocation of mono even in cases where the base path can not be determined"

This reverts commit 43bdbd6f77b60ed488f32bda2c9d665b3158e1f6.

Conflicts:
	mono/metadata/assembly.c
Merge branch 'master' of github.com:mono/mono into symform-3-0